!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.io=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
    
    module.exports = _dereq_('./lib/');
    
    },{"./lib/":2}],2:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var url = _dereq_('./url');
    var parser = _dereq_('socket.io-parser');
    var Manager = _dereq_('./manager');
    var debug = _dereq_('debug')('socket.io-client');
    
    /**
     * Module exports.
     */
    
    module.exports = exports = lookup;
    
    /**
     * Managers cache.
     */
    
    var cache = exports.managers = {};
    
    /**
     * Looks up an existing `Manager` for multiplexing.
     * If the user summons:
     *
     *   `io('http://localhost/a');`
     *   `io('http://localhost/b');`
     *
     * We reuse the existing instance based on same scheme/port/host,
     * and we initialize sockets for each namespace.
     *
     * @api public
     */
    
    function lookup(uri, opts) {
      if (typeof uri == 'object') {
        opts = uri;
        uri = undefined;
      }
    
      opts = opts || {};
    
      var parsed = url(uri);
      var source = parsed.source;
      var id = parsed.id;
      var io;
    
      if (opts.forceNew || opts['force new connection'] || false === opts.multiplex) {
        debug('ignoring socket cache for %s', source);
        io = Manager(source, opts);
      } else {
        if (!cache[id]) {
          debug('new io instance for %s', source);
          cache[id] = Manager(source, opts);
        }
        io = cache[id];
      }
    
      return io.socket(parsed.path);
    }
    
    /**
     * Protocol version.
     *
     * @api public
     */
    
    exports.protocol = parser.protocol;
    
    /**
     * `connect`.
     *
     * @param {String} uri
     * @api public
     */
    
    exports.connect = lookup;
    
    /**
     * Expose constructors for standalone build.
     *
     * @api public
     */
    
    exports.Manager = _dereq_('./manager');
    exports.Socket = _dereq_('./socket');
    
    },{"./manager":3,"./socket":5,"./url":6,"debug":10,"socket.io-parser":46}],3:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var url = _dereq_('./url');
    var eio = _dereq_('engine.io-client');
    var Socket = _dereq_('./socket');
    var Emitter = _dereq_('component-emitter');
    var parser = _dereq_('socket.io-parser');
    var on = _dereq_('./on');
    var bind = _dereq_('component-bind');
    var object = _dereq_('object-component');
    var debug = _dereq_('debug')('socket.io-client:manager');
    var indexOf = _dereq_('indexof');
    var Backoff = _dereq_('backo2');
    
    /**
     * Module exports
     */
    
    module.exports = Manager;
    
    /**
     * `Manager` constructor.
     *
     * @param {String} engine instance or engine uri/opts
     * @param {Object} options
     * @api public
     */
    
    function Manager(uri, opts){
      if (!(this instanceof Manager)) return new Manager(uri, opts);
      if (uri && ('object' == typeof uri)) {
        opts = uri;
        uri = undefined;
      }
      opts = opts || {};
    
      opts.path = opts.path || '/socket.io';
      this.nsps = {};
      this.subs = [];
      this.opts = opts;
      this.reconnection(opts.reconnection !== false);
      this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
      this.reconnectionDelay(opts.reconnectionDelay || 1000);
      this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
      this.randomizationFactor(opts.randomizationFactor || 0.5);
      this.backoff = new Backoff({
        min: this.reconnectionDelay(),
        max: this.reconnectionDelayMax(),
        jitter: this.randomizationFactor()
      });
      this.timeout(null == opts.timeout ? 20000 : opts.timeout);
      this.readyState = 'closed';
      this.uri = uri;
      this.connected = [];
      this.encoding = false;
      this.packetBuffer = [];
      this.encoder = new parser.Encoder();
      this.decoder = new parser.Decoder();
      this.autoConnect = opts.autoConnect !== false;
      if (this.autoConnect) this.open();
    }
    
    /**
     * Propagate given event to sockets and emit on `this`
     *
     * @api private
     */
    
    Manager.prototype.emitAll = function() {
      this.emit.apply(this, arguments);
      for (var nsp in this.nsps) {
        this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
      }
    };
    
    /**
     * Update `socket.id` of all sockets
     *
     * @api private
     */
    
    Manager.prototype.updateSocketIds = function(){
      for (var nsp in this.nsps) {
        this.nsps[nsp].id = this.engine.id;
      }
    };
    
    /**
     * Mix in `Emitter`.
     */
    
    Emitter(Manager.prototype);
    
    /**
     * Sets the `reconnection` config.
     *
     * @param {Boolean} true/false if it should automatically reconnect
     * @return {Manager} self or value
     * @api public
     */
    
    Manager.prototype.reconnection = function(v){
      if (!arguments.length) return this._reconnection;
      this._reconnection = !!v;
      return this;
    };
    
    /**
     * Sets the reconnection attempts config.
     *
     * @param {Number} max reconnection attempts before giving up
     * @return {Manager} self or value
     * @api public
     */
    
    Manager.prototype.reconnectionAttempts = function(v){
      if (!arguments.length) return this._reconnectionAttempts;
      this._reconnectionAttempts = v;
      return this;
    };
    
    /**
     * Sets the delay between reconnections.
     *
     * @param {Number} delay
     * @return {Manager} self or value
     * @api public
     */
    
    Manager.prototype.reconnectionDelay = function(v){
      if (!arguments.length) return this._reconnectionDelay;
      this._reconnectionDelay = v;
      this.backoff && this.backoff.setMin(v);
      return this;
    };
    
    Manager.prototype.randomizationFactor = function(v){
      if (!arguments.length) return this._randomizationFactor;
      this._randomizationFactor = v;
      this.backoff && this.backoff.setJitter(v);
      return this;
    };
    
    /**
     * Sets the maximum delay between reconnections.
     *
     * @param {Number} delay
     * @return {Manager} self or value
     * @api public
     */
    
    Manager.prototype.reconnectionDelayMax = function(v){
      if (!arguments.length) return this._reconnectionDelayMax;
      this._reconnectionDelayMax = v;
      this.backoff && this.backoff.setMax(v);
      return this;
    };
    
    /**
     * Sets the connection timeout. `false` to disable
     *
     * @return {Manager} self or value
     * @api public
     */
    
    Manager.prototype.timeout = function(v){
      if (!arguments.length) return this._timeout;
      this._timeout = v;
      return this;
    };
    
    /**
     * Starts trying to reconnect if reconnection is enabled and we have not
     * started reconnecting yet
     *
     * @api private
     */
    
    Manager.prototype.maybeReconnectOnOpen = function() {
      // Only try to reconnect if it's the first time we're connecting
      if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
        // keeps reconnection from firing twice for the same reconnection loop
        this.reconnect();
      }
    };
    
    
    /**
     * Sets the current transport `socket`.
     *
     * @param {Function} optional, callback
     * @return {Manager} self
     * @api public
     */
    
    Manager.prototype.open =
    Manager.prototype.connect = function(fn){
      debug('readyState %s', this.readyState);
      if (~this.readyState.indexOf('open')) return this;
    
      debug('opening %s', this.uri);
      this.engine = eio(this.uri, this.opts);
      var socket = this.engine;
      var self = this;
      this.readyState = 'opening';
      this.skipReconnect = false;
    
      // emit `open`
      var openSub = on(socket, 'open', function() {
        self.onopen();
        fn && fn();
      });
    
      // emit `connect_error`
      var errorSub = on(socket, 'error', function(data){
        debug('connect_error');
        self.cleanup();
        self.readyState = 'closed';
        self.emitAll('connect_error', data);
        if (fn) {
          var err = new Error('Connection error');
          err.data = data;
          fn(err);
        } else {
          // Only do this if there is no fn to handle the error
          self.maybeReconnectOnOpen();
        }
      });
    
      // emit `connect_timeout`
      if (false !== this._timeout) {
        var timeout = this._timeout;
        debug('connect attempt will timeout after %d', timeout);
    
        // set timer
        var timer = setTimeout(function(){
          debug('connect attempt timed out after %d', timeout);
          openSub.destroy();
          socket.close();
          socket.emit('error', 'timeout');
          self.emitAll('connect_timeout', timeout);
        }, timeout);
    
        this.subs.push({
          destroy: function(){
            clearTimeout(timer);
          }
        });
      }
    
      this.subs.push(openSub);
      this.subs.push(errorSub);
    
      return this;
    };
    
    /**
     * Called upon transport open.
     *
     * @api private
     */
    
    Manager.prototype.onopen = function(){
      debug('open');
    
      // clear old subs
      this.cleanup();
    
      // mark as open
      this.readyState = 'open';
      this.emit('open');
    
      // add new subs
      var socket = this.engine;
      this.subs.push(on(socket, 'data', bind(this, 'ondata')));
      this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
      this.subs.push(on(socket, 'error', bind(this, 'onerror')));
      this.subs.push(on(socket, 'close', bind(this, 'onclose')));
    };
    
    /**
     * Called with data.
     *
     * @api private
     */
    
    Manager.prototype.ondata = function(data){
      this.decoder.add(data);
    };
    
    /**
     * Called when parser fully decodes a packet.
     *
     * @api private
     */
    
    Manager.prototype.ondecoded = function(packet) {
      this.emit('packet', packet);
    };
    
    /**
     * Called upon socket error.
     *
     * @api private
     */
    
    Manager.prototype.onerror = function(err){
      debug('error', err);
      this.emitAll('error', err);
    };
    
    /**
     * Creates a new socket for the given `nsp`.
     *
     * @return {Socket}
     * @api public
     */
    
    Manager.prototype.socket = function(nsp){
      var socket = this.nsps[nsp];
      if (!socket) {
        socket = new Socket(this, nsp);
        this.nsps[nsp] = socket;
        var self = this;
        socket.on('connect', function(){
          socket.id = self.engine.id;
          if (!~indexOf(self.connected, socket)) {
            self.connected.push(socket);
          }
        });
      }
      return socket;
    };
    
    /**
     * Called upon a socket close.
     *
     * @param {Socket} socket
     */
    
    Manager.prototype.destroy = function(socket){
      var index = indexOf(this.connected, socket);
      if (~index) this.connected.splice(index, 1);
      if (this.connected.length) return;
    
      this.close();
    };
    
    /**
     * Writes a packet.
     *
     * @param {Object} packet
     * @api private
     */
    
    Manager.prototype.packet = function(packet){
      debug('writing packet %j', packet);
      var self = this;
    
      if (!self.encoding) {
        // encode, then write to engine with result
        self.encoding = true;
        this.encoder.encode(packet, function(encodedPackets) {
          for (var i = 0; i < encodedPackets.length; i++) {
            self.engine.write(encodedPackets[i]);
          }
          self.encoding = false;
          self.processPacketQueue();
        });
      } else { // add packet to the queue
        self.packetBuffer.push(packet);
      }
    };
    
    /**
     * If packet buffer is non-empty, begins encoding the
     * next packet in line.
     *
     * @api private
     */
    
    Manager.prototype.processPacketQueue = function() {
      if (this.packetBuffer.length > 0 && !this.encoding) {
        var pack = this.packetBuffer.shift();
        this.packet(pack);
      }
    };
    
    /**
     * Clean up transport subscriptions and packet buffer.
     *
     * @api private
     */
    
    Manager.prototype.cleanup = function(){
      var sub;
      while (sub = this.subs.shift()) sub.destroy();
    
      this.packetBuffer = [];
      this.encoding = false;
    
      this.decoder.destroy();
    };
    
    /**
     * Close the current socket.
     *
     * @api private
     */
    
    Manager.prototype.close =
    Manager.prototype.disconnect = function(){
      this.skipReconnect = true;
      this.backoff.reset();
      this.readyState = 'closed';
      this.engine && this.engine.close();
    };
    
    /**
     * Called upon engine close.
     *
     * @api private
     */
    
    Manager.prototype.onclose = function(reason){
      debug('close');
      this.cleanup();
      this.backoff.reset();
      this.readyState = 'closed';
      this.emit('close', reason);
      if (this._reconnection && !this.skipReconnect) {
        this.reconnect();
      }
    };
    
    /**
     * Attempt a reconnection.
     *
     * @api private
     */
    
    Manager.prototype.reconnect = function(){
      if (this.reconnecting || this.skipReconnect) return this;
    
      var self = this;
    
      if (this.backoff.attempts >= this._reconnectionAttempts) {
        debug('reconnect failed');
        this.backoff.reset();
        this.emitAll('reconnect_failed');
        this.reconnecting = false;
      } else {
        var delay = this.backoff.duration();
        debug('will wait %dms before reconnect attempt', delay);
    
        this.reconnecting = true;
        var timer = setTimeout(function(){
          if (self.skipReconnect) return;
    
          debug('attempting reconnect');
          self.emitAll('reconnect_attempt', self.backoff.attempts);
          self.emitAll('reconnecting', self.backoff.attempts);
    
          // check again for the case socket closed in above events
          if (self.skipReconnect) return;
    
          self.open(function(err){
            if (err) {
              debug('reconnect attempt error');
              self.reconnecting = false;
              self.reconnect();
              self.emitAll('reconnect_error', err.data);
            } else {
              debug('reconnect success');
              self.onreconnect();
            }
          });
        }, delay);
    
        this.subs.push({
          destroy: function(){
            clearTimeout(timer);
          }
        });
      }
    };
    
    /**
     * Called upon successful reconnect.
     *
     * @api private
     */
    
    Manager.prototype.onreconnect = function(){
      var attempt = this.backoff.attempts;
      this.reconnecting = false;
      this.backoff.reset();
      this.updateSocketIds();
      this.emitAll('reconnect', attempt);
    };
    
    },{"./on":4,"./socket":5,"./url":6,"backo2":7,"component-bind":8,"component-emitter":9,"debug":10,"engine.io-client":11,"indexof":42,"object-component":43,"socket.io-parser":46}],4:[function(_dereq_,module,exports){
    
    /**
     * Module exports.
     */
    
    module.exports = on;
    
    /**
     * Helper for subscriptions.
     *
     * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
     * @param {String} event name
     * @param {Function} callback
     * @api public
     */
    
    function on(obj, ev, fn) {
      obj.on(ev, fn);
      return {
        destroy: function(){
          obj.removeListener(ev, fn);
        }
      };
    }
    
    },{}],5:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var parser = _dereq_('socket.io-parser');
    var Emitter = _dereq_('component-emitter');
    var toArray = _dereq_('to-array');
    var on = _dereq_('./on');
    var bind = _dereq_('component-bind');
    var debug = _dereq_('debug')('socket.io-client:socket');
    var hasBin = _dereq_('has-binary');
    
    /**
     * Module exports.
     */
    
    module.exports = exports = Socket;
    
    /**
     * Internal events (blacklisted).
     * These events can't be emitted by the user.
     *
     * @api private
     */
    
    var events = {
      connect: 1,
      connect_error: 1,
      connect_timeout: 1,
      disconnect: 1,
      error: 1,
      reconnect: 1,
      reconnect_attempt: 1,
      reconnect_failed: 1,
      reconnect_error: 1,
      reconnecting: 1
    };
    
    /**
     * Shortcut to `Emitter#emit`.
     */
    
    var emit = Emitter.prototype.emit;
    
    /**
     * `Socket` constructor.
     *
     * @api public
     */
    
    function Socket(io, nsp){
      this.io = io;
      this.nsp = nsp;
      this.json = this; // compat
      this.ids = 0;
      this.acks = {};
      if (this.io.autoConnect) this.open();
      this.receiveBuffer = [];
      this.sendBuffer = [];
      this.connected = false;
      this.disconnected = true;
    }
    
    /**
     * Mix in `Emitter`.
     */
    
    Emitter(Socket.prototype);
    
    /**
     * Subscribe to open, close and packet events
     *
     * @api private
     */
    
    Socket.prototype.subEvents = function() {
      if (this.subs) return;
    
      var io = this.io;
      this.subs = [
        on(io, 'open', bind(this, 'onopen')),
        on(io, 'packet', bind(this, 'onpacket')),
        on(io, 'close', bind(this, 'onclose'))
      ];
    };
    
    /**
     * "Opens" the socket.
     *
     * @api public
     */
    
    Socket.prototype.open =
    Socket.prototype.connect = function(){
      if (this.connected) return this;
    
      this.subEvents();
      this.io.open(); // ensure open
      if ('open' == this.io.readyState) this.onopen();
      return this;
    };
    
    /**
     * Sends a `message` event.
     *
     * @return {Socket} self
     * @api public
     */
    
    Socket.prototype.send = function(){
      var args = toArray(arguments);
      args.unshift('message');
      this.emit.apply(this, args);
      return this;
    };
    
    /**
     * Override `emit`.
     * If the event is in `events`, it's emitted normally.
     *
     * @param {String} event name
     * @return {Socket} self
     * @api public
     */
    
    Socket.prototype.emit = function(ev){
      if (events.hasOwnProperty(ev)) {
        emit.apply(this, arguments);
        return this;
      }
    
      var args = toArray(arguments);
      var parserType = parser.EVENT; // default
      if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
      var packet = { type: parserType, data: args };
    
      // event ack callback
      if ('function' == typeof args[args.length - 1]) {
        debug('emitting packet with ack id %d', this.ids);
        this.acks[this.ids] = args.pop();
        packet.id = this.ids++;
      }
    
      if (this.connected) {
        this.packet(packet);
      } else {
        this.sendBuffer.push(packet);
      }
    
      return this;
    };
    
    /**
     * Sends a packet.
     *
     * @param {Object} packet
     * @api private
     */
    
    Socket.prototype.packet = function(packet){
      packet.nsp = this.nsp;
      this.io.packet(packet);
    };
    
    /**
     * Called upon engine `open`.
     *
     * @api private
     */
    
    Socket.prototype.onopen = function(){
      debug('transport is open - connecting');
    
      // write connect packet if necessary
      if ('/' != this.nsp) {
        this.packet({ type: parser.CONNECT });
      }
    };
    
    /**
     * Called upon engine `close`.
     *
     * @param {String} reason
     * @api private
     */
    
    Socket.prototype.onclose = function(reason){
      debug('close (%s)', reason);
      this.connected = false;
      this.disconnected = true;
      delete this.id;
      this.emit('disconnect', reason);
    };
    
    /**
     * Called with socket packet.
     *
     * @param {Object} packet
     * @api private
     */
    
    Socket.prototype.onpacket = function(packet){
      if (packet.nsp != this.nsp) return;
    
      switch (packet.type) {
        case parser.CONNECT:
          this.onconnect();
          break;
    
        case parser.EVENT:
          this.onevent(packet);
          break;
    
        case parser.BINARY_EVENT:
          this.onevent(packet);
          break;
    
        case parser.ACK:
          this.onack(packet);
          break;
    
        case parser.BINARY_ACK:
          this.onack(packet);
          break;
    
        case parser.DISCONNECT:
          this.ondisconnect();
          break;
    
        case parser.ERROR:
          this.emit('error', packet.data);
          break;
      }
    };
    
    /**
     * Called upon a server event.
     *
     * @param {Object} packet
     * @api private
     */
    
    Socket.prototype.onevent = function(packet){
      var args = packet.data || [];
      debug('emitting event %j', args);
    
      if (null != packet.id) {
        debug('attaching ack callback to event');
        args.push(this.ack(packet.id));
      }
    
      if (this.connected) {
        emit.apply(this, args);
      } else {
        this.receiveBuffer.push(args);
      }
    };
    
    /**
     * Produces an ack callback to emit with an event.
     *
     * @api private
     */
    
    Socket.prototype.ack = function(id){
      var self = this;
      var sent = false;
      return function(){
        // prevent double callbacks
        if (sent) return;
        sent = true;
        var args = toArray(arguments);
        debug('sending ack %j', args);
    
        var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
        self.packet({
          type: type,
          id: id,
          data: args
        });
      };
    };
    
    /**
     * Called upon a server acknowlegement.
     *
     * @param {Object} packet
     * @api private
     */
    
    Socket.prototype.onack = function(packet){
      debug('calling ack %s with %j', packet.id, packet.data);
      var fn = this.acks[packet.id];
      fn.apply(this, packet.data);
      delete this.acks[packet.id];
    };
    
    /**
     * Called upon server connect.
     *
     * @api private
     */
    
    Socket.prototype.onconnect = function(){
      this.connected = true;
      this.disconnected = false;
      this.emit('connect');
      this.emitBuffered();
    };
    
    /**
     * Emit buffered events (received and emitted).
     *
     * @api private
     */
    
    Socket.prototype.emitBuffered = function(){
      var i;
      for (i = 0; i < this.receiveBuffer.length; i++) {
        emit.apply(this, this.receiveBuffer[i]);
      }
      this.receiveBuffer = [];
    
      for (i = 0; i < this.sendBuffer.length; i++) {
        this.packet(this.sendBuffer[i]);
      }
      this.sendBuffer = [];
    };
    
    /**
     * Called upon server disconnect.
     *
     * @api private
     */
    
    Socket.prototype.ondisconnect = function(){
      debug('server disconnect (%s)', this.nsp);
      this.destroy();
      this.onclose('io server disconnect');
    };
    
    /**
     * Called upon forced client/server side disconnections,
     * this method ensures the manager stops tracking us and
     * that reconnections don't get triggered for this.
     *
     * @api private.
     */
    
    Socket.prototype.destroy = function(){
      if (this.subs) {
        // clean subscriptions to avoid reconnections
        for (var i = 0; i < this.subs.length; i++) {
          this.subs[i].destroy();
        }
        this.subs = null;
      }
    
      this.io.destroy(this);
    };
    
    /**
     * Disconnects the socket manually.
     *
     * @return {Socket} self
     * @api public
     */
    
    Socket.prototype.close =
    Socket.prototype.disconnect = function(){
      if (this.connected) {
        debug('performing disconnect (%s)', this.nsp);
        this.packet({ type: parser.DISCONNECT });
      }
    
      // remove socket from pool
      this.destroy();
    
      if (this.connected) {
        // fire events
        this.onclose('io client disconnect');
      }
      return this;
    };
    
    },{"./on":4,"component-bind":8,"component-emitter":9,"debug":10,"has-binary":38,"socket.io-parser":46,"to-array":50}],6:[function(_dereq_,module,exports){
    (function (global){
    
    /**
     * Module dependencies.
     */
    
    var parseuri = _dereq_('parseuri');
    var debug = _dereq_('debug')('socket.io-client:url');
    
    /**
     * Module exports.
     */
    
    module.exports = url;
    
    /**
     * URL parser.
     *
     * @param {String} url
     * @param {Object} An object meant to mimic window.location.
     *                 Defaults to window.location.
     * @api public
     */
    
    function url(uri, loc){
      var obj = uri;
    
      // default to window.location
      var loc = loc || global.location;
      if (null == uri) uri = loc.protocol + '//' + loc.host;
    
      // relative path support
      if ('string' == typeof uri) {
        if ('/' == uri.charAt(0)) {
          if ('/' == uri.charAt(1)) {
            uri = loc.protocol + uri;
          } else {
            uri = loc.hostname + uri;
          }
        }
    
        if (!/^(https?|wss?):\/\//.test(uri)) {
          debug('protocol-less url %s', uri);
          if ('undefined' != typeof loc) {
            uri = loc.protocol + '//' + uri;
          } else {
            uri = 'https://' + uri;
          }
        }
    
        // parse
        debug('parse %s', uri);
        obj = parseuri(uri);
      }
    
      // make sure we treat `localhost:80` and `localhost` equally
      if (!obj.port) {
        if (/^(http|ws)$/.test(obj.protocol)) {
          obj.port = '80';
        }
        else if (/^(http|ws)s$/.test(obj.protocol)) {
          obj.port = '443';
        }
      }
    
      obj.path = obj.path || '/';
    
      // define unique id
      obj.id = obj.protocol + '://' + obj.host + ':' + obj.port;
      // define href
      obj.href = obj.protocol + '://' + obj.host + (loc && loc.port == obj.port ? '' : (':' + obj.port));
    
      return obj;
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"debug":10,"parseuri":44}],7:[function(_dereq_,module,exports){
    
    /**
     * Expose `Backoff`.
     */
    
    module.exports = Backoff;
    
    /**
     * Initialize backoff timer with `opts`.
     *
     * - `min` initial timeout in milliseconds [100]
     * - `max` max timeout [10000]
     * - `jitter` [0]
     * - `factor` [2]
     *
     * @param {Object} opts
     * @api public
     */
    
    function Backoff(opts) {
      opts = opts || {};
      this.ms = opts.min || 100;
      this.max = opts.max || 10000;
      this.factor = opts.factor || 2;
      this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
      this.attempts = 0;
    }
    
    /**
     * Return the backoff duration.
     *
     * @return {Number}
     * @api public
     */
    
    Backoff.prototype.duration = function(){
      var ms = this.ms * Math.pow(this.factor, this.attempts++);
      if (this.jitter) {
        var rand =  Math.random();
        var deviation = Math.floor(rand * this.jitter * ms);
        ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
      }
      return Math.min(ms, this.max) | 0;
    };
    
    /**
     * Reset the number of attempts.
     *
     * @api public
     */
    
    Backoff.prototype.reset = function(){
      this.attempts = 0;
    };
    
    /**
     * Set the minimum duration
     *
     * @api public
     */
    
    Backoff.prototype.setMin = function(min){
      this.ms = min;
    };
    
    /**
     * Set the maximum duration
     *
     * @api public
     */
    
    Backoff.prototype.setMax = function(max){
      this.max = max;
    };
    
    /**
     * Set the jitter
     *
     * @api public
     */
    
    Backoff.prototype.setJitter = function(jitter){
      this.jitter = jitter;
    };
    
    
    },{}],8:[function(_dereq_,module,exports){
    /**
     * Slice reference.
     */
    
    var slice = [].slice;
    
    /**
     * Bind `obj` to `fn`.
     *
     * @param {Object} obj
     * @param {Function|String} fn or string
     * @return {Function}
     * @api public
     */
    
    module.exports = function(obj, fn){
      if ('string' == typeof fn) fn = obj[fn];
      if ('function' != typeof fn) throw new Error('bind() requires a function');
      var args = slice.call(arguments, 2);
      return function(){
        return fn.apply(obj, args.concat(slice.call(arguments)));
      }
    };
    
    },{}],9:[function(_dereq_,module,exports){
    
    /**
     * Expose `Emitter`.
     */
    
    module.exports = Emitter;
    
    /**
     * Initialize a new `Emitter`.
     *
     * @api public
     */
    
    function Emitter(obj) {
      if (obj) return mixin(obj);
    };
    
    /**
     * Mixin the emitter properties.
     *
     * @param {Object} obj
     * @return {Object}
     * @api private
     */
    
    function mixin(obj) {
      for (var key in Emitter.prototype) {
        obj[key] = Emitter.prototype[key];
      }
      return obj;
    }
    
    /**
     * Listen on the given `event` with `fn`.
     *
     * @param {String} event
     * @param {Function} fn
     * @return {Emitter}
     * @api public
     */
    
    Emitter.prototype.on =
    Emitter.prototype.addEventListener = function(event, fn){
      this._callbacks = this._callbacks || {};
      (this._callbacks[event] = this._callbacks[event] || [])
        .push(fn);
      return this;
    };
    
    /**
     * Adds an `event` listener that will be invoked a single
     * time then automatically removed.
     *
     * @param {String} event
     * @param {Function} fn
     * @return {Emitter}
     * @api public
     */
    
    Emitter.prototype.once = function(event, fn){
      var self = this;
      this._callbacks = this._callbacks || {};
    
      function on() {
        self.off(event, on);
        fn.apply(this, arguments);
      }
    
      on.fn = fn;
      this.on(event, on);
      return this;
    };
    
    /**
     * Remove the given callback for `event` or all
     * registered callbacks.
     *
     * @param {String} event
     * @param {Function} fn
     * @return {Emitter}
     * @api public
     */
    
    Emitter.prototype.off =
    Emitter.prototype.removeListener =
    Emitter.prototype.removeAllListeners =
    Emitter.prototype.removeEventListener = function(event, fn){
      this._callbacks = this._callbacks || {};
    
      // all
      if (0 == arguments.length) {
        this._callbacks = {};
        return this;
      }
    
      // specific event
      var callbacks = this._callbacks[event];
      if (!callbacks) return this;
    
      // remove all handlers
      if (1 == arguments.length) {
        delete this._callbacks[event];
        return this;
      }
    
      // remove specific handler
      var cb;
      for (var i = 0; i < callbacks.length; i++) {
        cb = callbacks[i];
        if (cb === fn || cb.fn === fn) {
          callbacks.splice(i, 1);
          break;
        }
      }
      return this;
    };
    
    /**
     * Emit `event` with the given args.
     *
     * @param {String} event
     * @param {Mixed} ...
     * @return {Emitter}
     */
    
    Emitter.prototype.emit = function(event){
      this._callbacks = this._callbacks || {};
      var args = [].slice.call(arguments, 1)
        , callbacks = this._callbacks[event];
    
      if (callbacks) {
        callbacks = callbacks.slice(0);
        for (var i = 0, len = callbacks.length; i < len; ++i) {
          callbacks[i].apply(this, args);
        }
      }
    
      return this;
    };
    
    /**
     * Return array of callbacks for `event`.
     *
     * @param {String} event
     * @return {Array}
     * @api public
     */
    
    Emitter.prototype.listeners = function(event){
      this._callbacks = this._callbacks || {};
      return this._callbacks[event] || [];
    };
    
    /**
     * Check if this emitter has `event` handlers.
     *
     * @param {String} event
     * @return {Boolean}
     * @api public
     */
    
    Emitter.prototype.hasListeners = function(event){
      return !! this.listeners(event).length;
    };
    
    },{}],10:[function(_dereq_,module,exports){
    
    /**
     * Expose `debug()` as the module.
     */
    
    module.exports = debug;
    
    /**
     * Create a debugger with the given `name`.
     *
     * @param {String} name
     * @return {Type}
     * @api public
     */
    
    function debug(name) {
      if (!debug.enabled(name)) return function(){};
    
      return function(fmt){
        fmt = coerce(fmt);
    
        var curr = new Date;
        var ms = curr - (debug[name] || curr);
        debug[name] = curr;
    
        fmt = name
          + ' '
          + fmt
          + ' +' + debug.humanize(ms);
    
        // This hackery is required for IE8
        // where `console.log` doesn't have 'apply'
        window.console
          && console.log
          && Function.prototype.apply.call(console.log, console, arguments);
      }
    }
    
    /**
     * The currently active debug mode names.
     */
    
    debug.names = [];
    debug.skips = [];
    
    /**
     * Enables a debug mode by name. This can include modes
     * separated by a colon and wildcards.
     *
     * @param {String} name
     * @api public
     */
    
    debug.enable = function(name) {
      try {
        localStorage.debug = name;
      } catch(e){}
    
      var split = (name || '').split(/[\s,]+/)
        , len = split.length;
    
      for (var i = 0; i < len; i++) {
        name = split[i].replace('*', '.*?');
        if (name[0] === '-') {
          debug.skips.push(new RegExp('^' + name.substr(1) + '$'));
        }
        else {
          debug.names.push(new RegExp('^' + name + '$'));
        }
      }
    };
    
    /**
     * Disable debug output.
     *
     * @api public
     */
    
    debug.disable = function(){
      debug.enable('');
    };
    
    /**
     * Humanize the given `ms`.
     *
     * @param {Number} m
     * @return {String}
     * @api private
     */
    
    debug.humanize = function(ms) {
      var sec = 1000
        , min = 60 * 1000
        , hour = 60 * min;
    
      if (ms >= hour) return (ms / hour).toFixed(1) + 'h';
      if (ms >= min) return (ms / min).toFixed(1) + 'm';
      if (ms >= sec) return (ms / sec | 0) + 's';
      return ms + 'ms';
    };
    
    /**
     * Returns true if the given mode name is enabled, false otherwise.
     *
     * @param {String} name
     * @return {Boolean}
     * @api public
     */
    
    debug.enabled = function(name) {
      for (var i = 0, len = debug.skips.length; i < len; i++) {
        if (debug.skips[i].test(name)) {
          return false;
        }
      }
      for (var i = 0, len = debug.names.length; i < len; i++) {
        if (debug.names[i].test(name)) {
          return true;
        }
      }
      return false;
    };
    
    /**
     * Coerce `val`.
     */
    
    function coerce(val) {
      if (val instanceof Error) return val.stack || val.message;
      return val;
    }
    
    // persist
    
    try {
      if (window.localStorage) debug.enable(localStorage.debug);
    } catch(e){}
    
    },{}],11:[function(_dereq_,module,exports){
    
    module.exports =  _dereq_('./lib/');
    
    },{"./lib/":12}],12:[function(_dereq_,module,exports){
    
    module.exports = _dereq_('./socket');
    
    /**
     * Exports parser
     *
     * @api public
     *
     */
    module.exports.parser = _dereq_('engine.io-parser');
    
    },{"./socket":13,"engine.io-parser":25}],13:[function(_dereq_,module,exports){
    (function (global){
    /**
     * Module dependencies.
     */
    
    var transports = _dereq_('./transports');
    var Emitter = _dereq_('component-emitter');
    var debug = _dereq_('debug')('engine.io-client:socket');
    var index = _dereq_('indexof');
    var parser = _dereq_('engine.io-parser');
    var parseuri = _dereq_('parseuri');
    var parsejson = _dereq_('parsejson');
    var parseqs = _dereq_('parseqs');
    
    /**
     * Module exports.
     */
    
    module.exports = Socket;
    
    /**
     * Noop function.
     *
     * @api private
     */
    
    function noop(){}
    
    /**
     * Socket constructor.
     *
     * @param {String|Object} uri or options
     * @param {Object} options
     * @api public
     */
    
    function Socket(uri, opts){
      if (!(this instanceof Socket)) return new Socket(uri, opts);
    
      opts = opts || {};
    
      if (uri && 'object' == typeof uri) {
        opts = uri;
        uri = null;
      }
    
      if (uri) {
        uri = parseuri(uri);
        opts.host = uri.host;
        opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
        opts.port = uri.port;
        if (uri.query) opts.query = uri.query;
      }
    
      this.secure = null != opts.secure ? opts.secure :
        (global.location && 'https:' == location.protocol);
    
      if (opts.host) {
        var pieces = opts.host.split(':');
        opts.hostname = pieces.shift();
        if (pieces.length) {
          opts.port = pieces.pop();
        } else if (!opts.port) {
          // if no port is specified manually, use the protocol default
          opts.port = this.secure ? '443' : '80';
        }
      }
    
      this.agent = opts.agent || false;
      this.hostname = opts.hostname ||
        (global.location ? location.hostname : 'localhost');
      this.port = opts.port || (global.location && location.port ?
           location.port :
           (this.secure ? 443 : 80));
      this.query = opts.query || {};
      if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
      this.upgrade = false !== opts.upgrade;
      this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
      this.forceJSONP = !!opts.forceJSONP;
      this.jsonp = false !== opts.jsonp;
      this.forceBase64 = !!opts.forceBase64;
      this.enablesXDR = !!opts.enablesXDR;
      this.timestampParam = opts.timestampParam || 't';
      this.timestampRequests = opts.timestampRequests;
      this.transports = opts.transports || ['polling', 'websocket'];
      this.readyState = '';
      this.writeBuffer = [];
      this.callbackBuffer = [];
      this.policyPort = opts.policyPort || 843;
      this.rememberUpgrade = opts.rememberUpgrade || false;
      this.binaryType = null;
      this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
      this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || true) : false;
    
      // SSL options for Node.js client
      this.pfx = opts.pfx || null;
      this.key = opts.key || null;
      this.passphrase = opts.passphrase || null;
      this.cert = opts.cert || null;
      this.ca = opts.ca || null;
      this.ciphers = opts.ciphers || null;
      this.rejectUnauthorized = opts.rejectUnauthorized || null;
    
      this.open();
    }
    
    Socket.priorWebsocketSuccess = false;
    
    /**
     * Mix in `Emitter`.
     */
    
    Emitter(Socket.prototype);
    
    /**
     * Protocol version.
     *
     * @api public
     */
    
    Socket.protocol = parser.protocol; // this is an int
    
    /**
     * Expose deps for legacy compatibility
     * and standalone browser access.
     */
    
    Socket.Socket = Socket;
    Socket.Transport = _dereq_('./transport');
    Socket.transports = _dereq_('./transports');
    Socket.parser = _dereq_('engine.io-parser');
    
    /**
     * Creates transport of the given type.
     *
     * @param {String} transport name
     * @return {Transport}
     * @api private
     */
    
    Socket.prototype.createTransport = function (name) {
      debug('creating transport "%s"', name);
      var query = clone(this.query);
    
      // append engine.io protocol identifier
      query.EIO = parser.protocol;
    
      // transport name
      query.transport = name;
    
      // session id if we already have one
      if (this.id) query.sid = this.id;
    
      var transport = new transports[name]({
        agent: this.agent,
        hostname: this.hostname,
        port: this.port,
        secure: this.secure,
        path: this.path,
        query: query,
        forceJSONP: this.forceJSONP,
        jsonp: this.jsonp,
        forceBase64: this.forceBase64,
        enablesXDR: this.enablesXDR,
        timestampRequests: this.timestampRequests,
        timestampParam: this.timestampParam,
        policyPort: this.policyPort,
        socket: this,
        pfx: this.pfx,
        key: this.key,
        passphrase: this.passphrase,
        cert: this.cert,
        ca: this.ca,
        ciphers: this.ciphers,
        rejectUnauthorized: this.rejectUnauthorized,
        perMessageDeflate: this.perMessageDeflate
      });
    
      return transport;
    };
    
    function clone (obj) {
      var o = {};
      for (var i in obj) {
        if (obj.hasOwnProperty(i)) {
          o[i] = obj[i];
        }
      }
      return o;
    }
    
    /**
     * Initializes transport to use and starts probe.
     *
     * @api private
     */
    Socket.prototype.open = function () {
      var transport;
      if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
        transport = 'websocket';
      } else if (0 == this.transports.length) {
        // Emit error on next tick so it can be listened to
        var self = this;
        setTimeout(function() {
          self.emit('error', 'No transports available');
        }, 0);
        return;
      } else {
        transport = this.transports[0];
      }
      this.readyState = 'opening';
    
      // Retry with the next transport if the transport is disabled (jsonp: false)
      var transport;
      try {
        transport = this.createTransport(transport);
      } catch (e) {
        this.transports.shift();
        this.open();
        return;
      }
    
      transport.open();
      this.setTransport(transport);
    };
    
    /**
     * Sets the current transport. Disables the existing one (if any).
     *
     * @api private
     */
    
    Socket.prototype.setTransport = function(transport){
      debug('setting transport %s', transport.name);
      var self = this;
    
      if (this.transport) {
        debug('clearing existing transport %s', this.transport.name);
        this.transport.removeAllListeners();
      }
    
      // set up transport
      this.transport = transport;
    
      // set up transport listeners
      transport
      .on('drain', function(){
        self.onDrain();
      })
      .on('packet', function(packet){
        self.onPacket(packet);
      })
      .on('error', function(e){
        self.onError(e);
      })
      .on('close', function(){
        self.onClose('transport close');
      });
    };
    
    /**
     * Probes a transport.
     *
     * @param {String} transport name
     * @api private
     */
    
    Socket.prototype.probe = function (name) {
      debug('probing transport "%s"', name);
      var transport = this.createTransport(name, { probe: 1 })
        , failed = false
        , self = this;
    
      Socket.priorWebsocketSuccess = false;
    
      function onTransportOpen(){
        if (self.onlyBinaryUpgrades) {
          var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
          failed = failed || upgradeLosesBinary;
        }
        if (failed) return;
    
        debug('probe transport "%s" opened', name);
        transport.send([{ type: 'ping', data: 'probe', options: { compress: true } }]);
        transport.once('packet', function (msg) {
          if (failed) return;
          if ('pong' == msg.type && 'probe' == msg.data) {
            debug('probe transport "%s" pong', name);
            self.upgrading = true;
            self.emit('upgrading', transport);
            if (!transport) return;
            Socket.priorWebsocketSuccess = 'websocket' == transport.name;
    
            debug('pausing current transport "%s"', self.transport.name);
            self.transport.pause(function () {
              if (failed) return;
              if ('closed' == self.readyState) return;
              debug('changing transport and sending upgrade packet');
    
              cleanup();
    
              self.setTransport(transport);
              transport.send([{ type: 'upgrade', options: { compress: true } }]);
              self.emit('upgrade', transport);
              transport = null;
              self.upgrading = false;
              self.flush();
            });
          } else {
            debug('probe transport "%s" failed', name);
            var err = new Error('probe error');
            err.transport = transport.name;
            self.emit('upgradeError', err);
          }
        });
      }
    
      function freezeTransport() {
        if (failed) return;
    
        // Any callback called by transport should be ignored since now
        failed = true;
    
        cleanup();
    
        transport.close();
        transport = null;
      }
    
      //Handle any error that happens while probing
      function onerror(err) {
        var error = new Error('probe error: ' + err);
        error.transport = transport.name;
    
        freezeTransport();
    
        debug('probe transport "%s" failed because of error: %s', name, err);
    
        self.emit('upgradeError', error);
      }
    
      function onTransportClose(){
        onerror("transport closed");
      }
    
      //When the socket is closed while we're probing
      function onclose(){
        onerror("socket closed");
      }
    
      //When the socket is upgraded while we're probing
      function onupgrade(to){
        if (transport && to.name != transport.name) {
          debug('"%s" works - aborting "%s"', to.name, transport.name);
          freezeTransport();
        }
      }
    
      //Remove all listeners on the transport and on self
      function cleanup(){
        transport.removeListener('open', onTransportOpen);
        transport.removeListener('error', onerror);
        transport.removeListener('close', onTransportClose);
        self.removeListener('close', onclose);
        self.removeListener('upgrading', onupgrade);
      }
    
      transport.once('open', onTransportOpen);
      transport.once('error', onerror);
      transport.once('close', onTransportClose);
    
      this.once('close', onclose);
      this.once('upgrading', onupgrade);
    
      transport.open();
    
    };
    
    /**
     * Called when connection is deemed open.
     *
     * @api public
     */
    
    Socket.prototype.onOpen = function () {
      debug('socket open');
      this.readyState = 'open';
      Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
      this.emit('open');
      this.flush();
    
      // we check for `readyState` in case an `open`
      // listener already closed the socket
      if ('open' == this.readyState && this.upgrade && this.transport.pause) {
        debug('starting upgrade probes');
        for (var i = 0, l = this.upgrades.length; i < l; i++) {
          this.probe(this.upgrades[i]);
        }
      }
    };
    
    /**
     * Handles a packet.
     *
     * @api private
     */
    
    Socket.prototype.onPacket = function (packet) {
      if ('opening' == this.readyState || 'open' == this.readyState) {
        debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
    
        this.emit('packet', packet);
    
        // Socket is live - any packet counts
        this.emit('heartbeat');
    
        switch (packet.type) {
          case 'open':
            this.onHandshake(parsejson(packet.data));
            break;
    
          case 'pong':
            this.setPing();
            break;
    
          case 'error':
            var err = new Error('server error');
            err.code = packet.data;
            this.emit('error', err);
            break;
    
          case 'message':
            this.emit('data', packet.data);
            this.emit('message', packet.data);
            break;
        }
      } else {
        debug('packet received with socket readyState "%s"', this.readyState);
      }
    };
    
    /**
     * Called upon handshake completion.
     *
     * @param {Object} handshake obj
     * @api private
     */
    
    Socket.prototype.onHandshake = function (data) {
      this.emit('handshake', data);
      this.id = data.sid;
      this.transport.query.sid = data.sid;
      this.upgrades = this.filterUpgrades(data.upgrades);
      this.pingInterval = data.pingInterval;
      this.pingTimeout = data.pingTimeout;
      this.onOpen();
      // In case open handler closes socket
      if  ('closed' == this.readyState) return;
      this.setPing();
    
      // Prolong liveness of socket on heartbeat
      this.removeListener('heartbeat', this.onHeartbeat);
      this.on('heartbeat', this.onHeartbeat);
    };
    
    /**
     * Resets ping timeout.
     *
     * @api private
     */
    
    Socket.prototype.onHeartbeat = function (timeout) {
      clearTimeout(this.pingTimeoutTimer);
      var self = this;
      self.pingTimeoutTimer = setTimeout(function () {
        if ('closed' == self.readyState) return;
        self.onClose('ping timeout');
      }, timeout || (self.pingInterval + self.pingTimeout));
    };
    
    /**
     * Pings server every `this.pingInterval` and expects response
     * within `this.pingTimeout` or closes connection.
     *
     * @api private
     */
    
    Socket.prototype.setPing = function () {
      var self = this;
      clearTimeout(self.pingIntervalTimer);
      self.pingIntervalTimer = setTimeout(function () {
        debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
        self.ping();
        self.onHeartbeat(self.pingTimeout);
      }, self.pingInterval);
    };
    
    /**
    * Sends a ping packet.
    *
    * @api public
    */
    
    Socket.prototype.ping = function () {
      this.sendPacket('ping');
    };
    
    /**
     * Called on `drain` event
     *
     * @api private
     */
    
    Socket.prototype.onDrain = function() {
      for (var i = 0; i < this.prevBufferLen; i++) {
        if (this.callbackBuffer[i]) {
          this.callbackBuffer[i]();
        }
      }
    
      this.writeBuffer.splice(0, this.prevBufferLen);
      this.callbackBuffer.splice(0, this.prevBufferLen);
    
      // setting prevBufferLen = 0 is very important
      // for example, when upgrading, upgrade packet is sent over,
      // and a nonzero prevBufferLen could cause problems on `drain`
      this.prevBufferLen = 0;
    
      if (this.writeBuffer.length == 0) {
        this.emit('drain');
      } else {
        this.flush();
      }
    };
    
    /**
     * Flush write buffers.
     *
     * @api private
     */
    
    Socket.prototype.flush = function () {
      if ('closed' != this.readyState && this.transport.writable &&
        !this.upgrading && this.writeBuffer.length) {
        debug('flushing %d packets in socket', this.writeBuffer.length);
        this.transport.send(this.writeBuffer);
        // keep track of current length of writeBuffer
        // splice writeBuffer and callbackBuffer on `drain`
        this.prevBufferLen = this.writeBuffer.length;
        this.emit('flush');
      }
    };
    
    /**
     * Sends a message.
     *
     * @param {String} message.
     * @param {Function} callback function.
     * @param {Object} options.
     * @return {Socket} for chaining.
     * @api public
     */
    
    Socket.prototype.write =
    Socket.prototype.send = function (msg, options, fn) {
      this.sendPacket('message', msg, options, fn);
      return this;
    };
    
    /**
     * Sends a packet.
     *
     * @param {String} packet type.
     * @param {String} data.
     * @param {Object} options.
     * @param {Function} callback function.
     * @api private
     */
    
    Socket.prototype.sendPacket = function (type, data, options, fn) {
      if ('function' == typeof options) {
        fn = options;
        options = null;
      }
    
      if ('closing' == this.readyState || 'closed' == this.readyState) {
        return;
      }
    
      options = options || {};
      options.compress = false !== options.compress;
    
      var packet = {
        type: type,
        data: data,
        options: options
      };
      this.emit('packetCreate', packet);
      this.writeBuffer.push(packet);
      this.callbackBuffer.push(fn);
      this.flush();
    };
    
    /**
     * Closes the connection.
     *
     * @api private
     */
    
    Socket.prototype.close = function () {
      if ('opening' == this.readyState || 'open' == this.readyState) {
        this.readyState = 'closing';
    
        var self = this;
    
        function close() {
          self.onClose('forced close');
          debug('socket closing - telling transport to close');
          self.transport.close();
        }
    
        function cleanupAndClose() {
          self.removeListener('upgrade', cleanupAndClose);
          self.removeListener('upgradeError', cleanupAndClose);
          close();
        }
    
        function waitForUpgrade() {
          // wait for upgrade to finish since we can't send packets while pausing a transport
          self.once('upgrade', cleanupAndClose);
          self.once('upgradeError', cleanupAndClose);
        }
    
        if (this.writeBuffer.length) {
          this.once('drain', function() {
            if (this.upgrading) {
              waitForUpgrade();
            } else {
              close();
            }
          });
        } else if (this.upgrading) {
          waitForUpgrade();
        } else {
          close();
        }
      }
    
      return this;
    };
    
    /**
     * Called upon transport error
     *
     * @api private
     */
    
    Socket.prototype.onError = function (err) {
      debug('socket error %j', err);
      Socket.priorWebsocketSuccess = false;
      this.emit('error', err);
      this.onClose('transport error', err);
    };
    
    /**
     * Called upon transport close.
     *
     * @api private
     */
    
    Socket.prototype.onClose = function (reason, desc) {
      if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
        debug('socket close with reason: "%s"', reason);
        var self = this;
    
        // clear timers
        clearTimeout(this.pingIntervalTimer);
        clearTimeout(this.pingTimeoutTimer);
    
        // clean buffers in next tick, so developers can still
        // grab the buffers on `close` event
        setTimeout(function() {
          self.writeBuffer = [];
          self.callbackBuffer = [];
          self.prevBufferLen = 0;
        }, 0);
    
        // stop event from firing again for transport
        this.transport.removeAllListeners('close');
    
        // ensure transport won't stay open
        this.transport.close();
    
        // ignore further transport communication
        this.transport.removeAllListeners();
    
        // set ready state
        this.readyState = 'closed';
    
        // clear session id
        this.id = null;
    
        // emit close event
        this.emit('close', reason, desc);
      }
    };
    
    /**
     * Filters upgrades, returning only those matching client transports.
     *
     * @param {Array} server upgrades
     * @api private
     *
     */
    
    Socket.prototype.filterUpgrades = function (upgrades) {
      var filteredUpgrades = [];
      for (var i = 0, j = upgrades.length; i<j; i++) {
        if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
      }
      return filteredUpgrades;
    };
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./transport":14,"./transports":15,"component-emitter":9,"debug":22,"engine.io-parser":25,"indexof":42,"parsejson":34,"parseqs":35,"parseuri":36}],14:[function(_dereq_,module,exports){
    /**
     * Module dependencies.
     */
    
    var parser = _dereq_('engine.io-parser');
    var Emitter = _dereq_('component-emitter');
    
    /**
     * Module exports.
     */
    
    module.exports = Transport;
    
    /**
     * Transport abstract constructor.
     *
     * @param {Object} options.
     * @api private
     */
    
    function Transport (opts) {
      this.path = opts.path;
      this.hostname = opts.hostname;
      this.port = opts.port;
      this.secure = opts.secure;
      this.query = opts.query;
      this.timestampParam = opts.timestampParam;
      this.timestampRequests = opts.timestampRequests;
      this.readyState = '';
      this.agent = opts.agent || false;
      this.socket = opts.socket;
      this.enablesXDR = opts.enablesXDR;
    
      // SSL options for Node.js client
      this.pfx = opts.pfx;
      this.key = opts.key;
      this.passphrase = opts.passphrase;
      this.cert = opts.cert;
      this.ca = opts.ca;
      this.ciphers = opts.ciphers;
      this.rejectUnauthorized = opts.rejectUnauthorized;
    }
    
    /**
     * Mix in `Emitter`.
     */
    
    Emitter(Transport.prototype);
    
    /**
     * A counter used to prevent collisions in the timestamps used
     * for cache busting.
     */
    
    Transport.timestamps = 0;
    
    /**
     * Emits an error.
     *
     * @param {String} str
     * @return {Transport} for chaining
     * @api public
     */
    
    Transport.prototype.onError = function (msg, desc) {
      var err = new Error(msg);
      err.type = 'TransportError';
      err.description = desc;
      this.emit('error', err);
      return this;
    };
    
    /**
     * Opens the transport.
     *
     * @api public
     */
    
    Transport.prototype.open = function () {
      if ('closed' == this.readyState || '' == this.readyState) {
        this.readyState = 'opening';
        this.doOpen();
      }
    
      return this;
    };
    
    /**
     * Closes the transport.
     *
     * @api private
     */
    
    Transport.prototype.close = function () {
      if ('opening' == this.readyState || 'open' == this.readyState) {
        this.doClose();
        this.onClose();
      }
    
      return this;
    };
    
    /**
     * Sends multiple packets.
     *
     * @param {Array} packets
     * @api private
     */
    
    Transport.prototype.send = function(packets){
      if ('open' == this.readyState) {
        this.write(packets);
      } else {
        throw new Error('Transport not open');
      }
    };
    
    /**
     * Called upon open
     *
     * @api private
     */
    
    Transport.prototype.onOpen = function () {
      this.readyState = 'open';
      this.writable = true;
      this.emit('open');
    };
    
    /**
     * Called with data.
     *
     * @param {String} data
     * @api private
     */
    
    Transport.prototype.onData = function(data){
      var packet = parser.decodePacket(data, this.socket.binaryType);
      this.onPacket(packet);
    };
    
    /**
     * Called with a decoded packet.
     */
    
    Transport.prototype.onPacket = function (packet) {
      this.emit('packet', packet);
    };
    
    /**
     * Called upon close.
     *
     * @api private
     */
    
    Transport.prototype.onClose = function () {
      this.readyState = 'closed';
      this.emit('close');
    };
    
    },{"component-emitter":9,"engine.io-parser":25}],15:[function(_dereq_,module,exports){
    (function (global){
    /**
     * Module dependencies
     */
    
    var XMLHttpRequest = _dereq_('xmlhttprequest');
    var XHR = _dereq_('./polling-xhr');
    var JSONP = _dereq_('./polling-jsonp');
    var websocket = _dereq_('./websocket');
    
    /**
     * Export transports.
     */
    
    exports.polling = polling;
    exports.websocket = websocket;
    
    /**
     * Polling transport polymorphic constructor.
     * Decides on xhr vs jsonp based on feature detection.
     *
     * @api private
     */
    
    function polling(opts){
      var xhr;
      var xd = false;
      var xs = false;
      var jsonp = false !== opts.jsonp;
    
      if (global.location) {
        var isSSL = 'https:' == location.protocol;
        var port = location.port;
    
        // some user agents have empty `location.port`
        if (!port) {
          port = isSSL ? 443 : 80;
        }
    
        xd = opts.hostname != location.hostname || port != opts.port;
        xs = opts.secure != isSSL;
      }
    
      opts.xdomain = xd;
      opts.xscheme = xs;
      xhr = new XMLHttpRequest(opts);
    
      if ('open' in xhr && !opts.forceJSONP) {
        return new XHR(opts);
      } else {
        if (!jsonp) throw new Error('JSONP disabled');
        return new JSONP(opts);
      }
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./polling-jsonp":16,"./polling-xhr":17,"./websocket":19,"xmlhttprequest":20}],16:[function(_dereq_,module,exports){
    (function (global){
    
    /**
     * Module requirements.
     */
    
    var Polling = _dereq_('./polling');
    var inherit = _dereq_('component-inherit');
    
    /**
     * Module exports.
     */
    
    module.exports = JSONPPolling;
    
    /**
     * Cached regular expressions.
     */
    
    var rNewline = /\n/g;
    var rEscapedNewline = /\\n/g;
    
    /**
     * Global JSONP callbacks.
     */
    
    var callbacks;
    
    /**
     * Callbacks count.
     */
    
    var index = 0;
    
    /**
     * Noop.
     */
    
    function empty () { }
    
    /**
     * JSONP Polling constructor.
     *
     * @param {Object} opts.
     * @api public
     */
    
    function JSONPPolling (opts) {
      Polling.call(this, opts);
    
      this.query = this.query || {};
    
      // define global callbacks array if not present
      // we do this here (lazily) to avoid unneeded global pollution
      if (!callbacks) {
        // we need to consider multiple engines in the same page
        if (!global.___eio) global.___eio = [];
        callbacks = global.___eio;
      }
    
      // callback identifier
      this.index = callbacks.length;
    
      // add callback to jsonp global
      var self = this;
      callbacks.push(function (msg) {
        self.onData(msg);
      });
    
      // append to query string
      this.query.j = this.index;
    
      // prevent spurious errors from being emitted when the window is unloaded
      if (global.document && global.addEventListener) {
        global.addEventListener('beforeunload', function () {
          if (self.script) self.script.onerror = empty;
        }, false);
      }
    }
    
    /**
     * Inherits from Polling.
     */
    
    inherit(JSONPPolling, Polling);
    
    /*
     * JSONP only supports binary as base64 encoded strings
     */
    
    JSONPPolling.prototype.supportsBinary = false;
    
    /**
     * Closes the socket.
     *
     * @api private
     */
    
    JSONPPolling.prototype.doClose = function () {
      if (this.script) {
        this.script.parentNode.removeChild(this.script);
        this.script = null;
      }
    
      if (this.form) {
        this.form.parentNode.removeChild(this.form);
        this.form = null;
        this.iframe = null;
      }
    
      Polling.prototype.doClose.call(this);
    };
    
    /**
     * Starts a poll cycle.
     *
     * @api private
     */
    
    JSONPPolling.prototype.doPoll = function () {
      var self = this;
      var script = document.createElement('script');
    
      if (this.script) {
        this.script.parentNode.removeChild(this.script);
        this.script = null;
      }
    
      script.async = true;
      script.src = this.uri();
      script.onerror = function(e){
        self.onError('jsonp poll error',e);
      };
    
      var insertAt = document.getElementsByTagName('script')[0];
      insertAt.parentNode.insertBefore(script, insertAt);
      this.script = script;
    
      var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
      
      if (isUAgecko) {
        setTimeout(function () {
          var iframe = document.createElement('iframe');
          document.body.appendChild(iframe);
          document.body.removeChild(iframe);
        }, 100);
      }
    };
    
    /**
     * Writes with a hidden iframe.
     *
     * @param {String} data to send
     * @param {Function} called upon flush.
     * @api private
     */
    
    JSONPPolling.prototype.doWrite = function (data, fn) {
      var self = this;
    
      if (!this.form) {
        var form = document.createElement('form');
        var area = document.createElement('textarea');
        var id = this.iframeId = 'eio_iframe_' + this.index;
        var iframe;
    
        form.className = 'socketio';
        form.style.position = 'absolute';
        form.style.top = '-1000px';
        form.style.left = '-1000px';
        form.target = id;
        form.method = 'POST';
        form.setAttribute('accept-charset', 'utf-8');
        area.name = 'd';
        form.appendChild(area);
        document.body.appendChild(form);
    
        this.form = form;
        this.area = area;
      }
    
      this.form.action = this.uri();
    
      function complete () {
        initIframe();
        fn();
      }
    
      function initIframe () {
        if (self.iframe) {
          try {
            self.form.removeChild(self.iframe);
          } catch (e) {
            self.onError('jsonp polling iframe removal error', e);
          }
        }
    
        try {
          // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
          var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
          iframe = document.createElement(html);
        } catch (e) {
          iframe = document.createElement('iframe');
          iframe.name = self.iframeId;
          iframe.src = 'javascript:0';
        }
    
        iframe.id = self.iframeId;
    
        self.form.appendChild(iframe);
        self.iframe = iframe;
      }
    
      initIframe();
    
      // escape \n to prevent it from being converted into \r\n by some UAs
      // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
      data = data.replace(rEscapedNewline, '\\\n');
      this.area.value = data.replace(rNewline, '\\n');
    
      try {
        this.form.submit();
      } catch(e) {}
    
      if (this.iframe.attachEvent) {
        this.iframe.onreadystatechange = function(){
          if (self.iframe.readyState == 'complete') {
            complete();
          }
        };
      } else {
        this.iframe.onload = complete;
      }
    };
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./polling":18,"component-inherit":21}],17:[function(_dereq_,module,exports){
    (function (global){
    /**
     * Module requirements.
     */
    
    var XMLHttpRequest = _dereq_('xmlhttprequest');
    var Polling = _dereq_('./polling');
    var Emitter = _dereq_('component-emitter');
    var inherit = _dereq_('component-inherit');
    var debug = _dereq_('debug')('engine.io-client:polling-xhr');
    
    /**
     * Module exports.
     */
    
    module.exports = XHR;
    module.exports.Request = Request;
    
    /**
     * Empty function
     */
    
    function empty(){}
    
    /**
     * XHR Polling constructor.
     *
     * @param {Object} opts
     * @api public
     */
    
    function XHR(opts){
      Polling.call(this, opts);
    
      if (global.location) {
        var isSSL = 'https:' == location.protocol;
        var port = location.port;
    
        // some user agents have empty `location.port`
        if (!port) {
          port = isSSL ? 443 : 80;
        }
    
        this.xd = opts.hostname != global.location.hostname ||
          port != opts.port;
        this.xs = opts.secure != isSSL;
      }
    }
    
    /**
     * Inherits from Polling.
     */
    
    inherit(XHR, Polling);
    
    /**
     * XHR supports binary
     */
    
    XHR.prototype.supportsBinary = true;
    
    /**
     * Creates a request.
     *
     * @param {String} method
     * @api private
     */
    
    XHR.prototype.request = function(opts){
      opts = opts || {};
      opts.uri = this.uri();
      opts.xd = this.xd;
      opts.xs = this.xs;
      opts.agent = this.agent || false;
      opts.supportsBinary = this.supportsBinary;
      opts.enablesXDR = this.enablesXDR;
    
      // SSL options for Node.js client
      opts.pfx = this.pfx;
      opts.key = this.key;
      opts.passphrase = this.passphrase;
      opts.cert = this.cert;
      opts.ca = this.ca;
      opts.ciphers = this.ciphers;
      opts.rejectUnauthorized = this.rejectUnauthorized;
    
      return new Request(opts);
    };
    
    /**
     * Sends data.
     *
     * @param {String} data to send.
     * @param {Function} called upon flush.
     * @api private
     */
    
    XHR.prototype.doWrite = function(data, fn){
      var isBinary = typeof data !== 'string' && data !== undefined;
      var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
      var self = this;
      req.on('success', fn);
      req.on('error', function(err){
        self.onError('xhr post error', err);
      });
      this.sendXhr = req;
    };
    
    /**
     * Starts a poll cycle.
     *
     * @api private
     */
    
    XHR.prototype.doPoll = function(){
      debug('xhr poll');
      var req = this.request();
      var self = this;
      req.on('data', function(data){
        self.onData(data);
      });
      req.on('error', function(err){
        self.onError('xhr poll error', err);
      });
      this.pollXhr = req;
    };
    
    /**
     * Request constructor
     *
     * @param {Object} options
     * @api public
     */
    
    function Request(opts){
      this.method = opts.method || 'GET';
      this.uri = opts.uri;
      this.xd = !!opts.xd;
      this.xs = !!opts.xs;
      this.async = false !== opts.async;
      this.data = undefined != opts.data ? opts.data : null;
      this.agent = opts.agent;
      this.isBinary = opts.isBinary;
      this.supportsBinary = opts.supportsBinary;
      this.enablesXDR = opts.enablesXDR;
    
      // SSL options for Node.js client
      this.pfx = opts.pfx;
      this.key = opts.key;
      this.passphrase = opts.passphrase;
      this.cert = opts.cert;
      this.ca = opts.ca;
      this.ciphers = opts.ciphers;
      this.rejectUnauthorized = opts.rejectUnauthorized;
    
      this.create();
    }
    
    /**
     * Mix in `Emitter`.
     */
    
    Emitter(Request.prototype);
    
    /**
     * Creates the XHR object and sends the request.
     *
     * @api private
     */
    
    Request.prototype.create = function(){
      var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };
    
      // SSL options for Node.js client
      opts.pfx = this.pfx;
      opts.key = this.key;
      opts.passphrase = this.passphrase;
      opts.cert = this.cert;
      opts.ca = this.ca;
      opts.ciphers = this.ciphers;
      opts.rejectUnauthorized = this.rejectUnauthorized;
    
      var xhr = this.xhr = new XMLHttpRequest(opts);
      var self = this;
      try {
        debug('xhr open %s: %s', this.method, this.uri);
        xhr.open(this.method, this.uri, this.async);
        if (this.supportsBinary) {
          // This has to be done after open because Firefox is stupid
          // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
          xhr.responseType = 'arraybuffer';
        }
    
        if ('POST' == this.method) {
          try {
            if (this.isBinary) {
              xhr.setRequestHeader('Content-type', 'application/octet-stream');
            } else {
              xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
            }
          } catch (e) {}
        }
    
        // ie6 check
        if ('withCredentials' in xhr) {
          xhr.withCredentials = true;
        }
    
        if (this.hasXDR()) {
          xhr.onload = function(){
            self.onLoad();
          };
          xhr.onerror = function(){
            self.onError(xhr.responseText);
          };
        } else {
          xhr.onreadystatechange = function(){
            if (4 != xhr.readyState) return;
            if (200 == xhr.status || 1223 == xhr.status) {
              self.onLoad();
            } else {
              // make sure the `error` event handler that's user-set
              // does not throw in the same tick and gets caught here
              setTimeout(function(){
                self.onError(xhr.status);
              }, 0);
            }
          };
        }
    
        debug('xhr data %s', this.data);
        xhr.send(this.data);
      } catch (e) {
        // Need to defer since .create() is called directly fhrom the constructor
        // and thus the 'error' event can only be only bound *after* this exception
        // occurs.  Therefore, also, we cannot throw here at all.
        setTimeout(function() {
          self.onError(e);
        }, 0);
        return;
      }
    
      if (global.document) {
        this.index = Request.requestsCount++;
        Request.requests[this.index] = this;
      }
    };
    
    /**
     * Called upon successful response.
     *
     * @api private
     */
    
    Request.prototype.onSuccess = function(){
      this.emit('success');
      this.cleanup();
    };
    
    /**
     * Called if we have data.
     *
     * @api private
     */
    
    Request.prototype.onData = function(data){
      this.emit('data', data);
      this.onSuccess();
    };
    
    /**
     * Called upon error.
     *
     * @api private
     */
    
    Request.prototype.onError = function(err){
      this.emit('error', err);
      this.cleanup(true);
    };
    
    /**
     * Cleans up house.
     *
     * @api private
     */
    
    Request.prototype.cleanup = function(fromError){
      if ('undefined' == typeof this.xhr || null === this.xhr) {
        return;
      }
      // xmlhttprequest
      if (this.hasXDR()) {
        this.xhr.onload = this.xhr.onerror = empty;
      } else {
        this.xhr.onreadystatechange = empty;
      }
    
      if (fromError) {
        try {
          this.xhr.abort();
        } catch(e) {}
      }
    
      if (global.document) {
        delete Request.requests[this.index];
      }
    
      this.xhr = null;
    };
    
    /**
     * Called upon load.
     *
     * @api private
     */
    
    Request.prototype.onLoad = function(){
      var data;
      try {
        var contentType;
        try {
          contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
        } catch (e) {}
        if (contentType === 'application/octet-stream') {
          data = this.xhr.response;
        } else {
          if (!this.supportsBinary) {
            data = this.xhr.responseText;
          } else {
            data = 'ok';
          }
        }
      } catch (e) {
        this.onError(e);
      }
      if (null != data) {
        this.onData(data);
      }
    };
    
    /**
     * Check if it has XDomainRequest.
     *
     * @api private
     */
    
    Request.prototype.hasXDR = function(){
      return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
    };
    
    /**
     * Aborts the request.
     *
     * @api public
     */
    
    Request.prototype.abort = function(){
      this.cleanup();
    };
    
    /**
     * Aborts pending requests when unloading the window. This is needed to prevent
     * memory leaks (e.g. when using IE) and to ensure that no spurious error is
     * emitted.
     */
    
    if (global.document) {
      Request.requestsCount = 0;
      Request.requests = {};
      if (global.attachEvent) {
        global.attachEvent('onunload', unloadHandler);
      } else if (global.addEventListener) {
        global.addEventListener('beforeunload', unloadHandler, false);
      }
    }
    
    function unloadHandler() {
      for (var i in Request.requests) {
        if (Request.requests.hasOwnProperty(i)) {
          Request.requests[i].abort();
        }
      }
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./polling":18,"component-emitter":9,"component-inherit":21,"debug":22,"xmlhttprequest":20}],18:[function(_dereq_,module,exports){
    /**
     * Module dependencies.
     */
    
    var Transport = _dereq_('../transport');
    var parseqs = _dereq_('parseqs');
    var parser = _dereq_('engine.io-parser');
    var inherit = _dereq_('component-inherit');
    var debug = _dereq_('debug')('engine.io-client:polling');
    
    /**
     * Module exports.
     */
    
    module.exports = Polling;
    
    /**
     * Is XHR2 supported?
     */
    
    var hasXHR2 = (function() {
      var XMLHttpRequest = _dereq_('xmlhttprequest');
      var xhr = new XMLHttpRequest({ xdomain: false });
      return null != xhr.responseType;
    })();
    
    /**
     * Polling interface.
     *
     * @param {Object} opts
     * @api private
     */
    
    function Polling(opts){
      var forceBase64 = (opts && opts.forceBase64);
      if (!hasXHR2 || forceBase64) {
        this.supportsBinary = false;
      }
      Transport.call(this, opts);
    }
    
    /**
     * Inherits from Transport.
     */
    
    inherit(Polling, Transport);
    
    /**
     * Transport name.
     */
    
    Polling.prototype.name = 'polling';
    
    /**
     * Opens the socket (triggers polling). We write a PING message to determine
     * when the transport is open.
     *
     * @api private
     */
    
    Polling.prototype.doOpen = function(){
      this.poll();
    };
    
    /**
     * Pauses polling.
     *
     * @param {Function} callback upon buffers are flushed and transport is paused
     * @api private
     */
    
    Polling.prototype.pause = function(onPause){
      var pending = 0;
      var self = this;
    
      this.readyState = 'pausing';
    
      function pause(){
        debug('paused');
        self.readyState = 'paused';
        onPause();
      }
    
      if (this.polling || !this.writable) {
        var total = 0;
    
        if (this.polling) {
          debug('we are currently polling - waiting to pause');
          total++;
          this.once('pollComplete', function(){
            debug('pre-pause polling complete');
            --total || pause();
          });
        }
    
        if (!this.writable) {
          debug('we are currently writing - waiting to pause');
          total++;
          this.once('drain', function(){
            debug('pre-pause writing complete');
            --total || pause();
          });
        }
      } else {
        pause();
      }
    };
    
    /**
     * Starts polling cycle.
     *
     * @api public
     */
    
    Polling.prototype.poll = function(){
      debug('polling');
      this.polling = true;
      this.doPoll();
      this.emit('poll');
    };
    
    /**
     * Overloads onData to detect payloads.
     *
     * @api private
     */
    
    Polling.prototype.onData = function(data){
      var self = this;
      debug('polling got data %s', data);
      var callback = function(packet, index, total) {
        // if its the first message we consider the transport open
        if ('opening' == self.readyState) {
          self.onOpen();
        }
    
        // if its a close packet, we close the ongoing requests
        if ('close' == packet.type) {
          self.onClose();
          return false;
        }
    
        // otherwise bypass onData and handle the message
        self.onPacket(packet);
      };
    
      // decode payload
      parser.decodePayload(data, this.socket.binaryType, callback);
    
      // if an event did not trigger closing
      if ('closed' != this.readyState) {
        // if we got data we're not polling
        this.polling = false;
        this.emit('pollComplete');
    
        if ('open' == this.readyState) {
          this.poll();
        } else {
          debug('ignoring poll - transport state "%s"', this.readyState);
        }
      }
    };
    
    /**
     * For polling, send a close packet.
     *
     * @api private
     */
    
    Polling.prototype.doClose = function(){
      var self = this;
    
      function close(){
        debug('writing close packet');
        self.write([{ type: 'close' }]);
      }
    
      if ('open' == this.readyState) {
        debug('transport open - closing');
        close();
      } else {
        // in case we're trying to close while
        // handshaking is in progress (GH-164)
        debug('transport not open - deferring close');
        this.once('open', close);
      }
    };
    
    /**
     * Writes a packets payload.
     *
     * @param {Array} data packets
     * @param {Function} drain callback
     * @api private
     */
    
    Polling.prototype.write = function(packets){
      var self = this;
      this.writable = false;
      var callbackfn = function() {
        self.writable = true;
        self.emit('drain');
      };
    
      var self = this;
      parser.encodePayload(packets, this.supportsBinary, function(data) {
        self.doWrite(data, callbackfn);
      });
    };
    
    /**
     * Generates uri for connection.
     *
     * @api private
     */
    
    Polling.prototype.uri = function(){
      var query = this.query || {};
      var schema = this.secure ? 'https' : 'http';
      var port = '';
    
      // cache busting is forced
      if (false !== this.timestampRequests) {
        query[this.timestampParam] = +new Date + '-' + Transport.timestamps++;
      }
    
      if (!this.supportsBinary && !query.sid) {
        query.b64 = 1;
      }
    
      query = parseqs.encode(query);
    
      // avoid port if default for schema
      if (this.port && (('https' == schema && this.port != 443) ||
         ('http' == schema && this.port != 80))) {
        port = ':' + this.port;
      }
    
      // prepend ? to query
      if (query.length) {
        query = '?' + query;
      }
    
      return schema + '://' + this.hostname + port + this.path + query;
    };
    
    },{"../transport":14,"component-inherit":21,"debug":22,"engine.io-parser":25,"parseqs":35,"xmlhttprequest":20}],19:[function(_dereq_,module,exports){
    /**
     * Module dependencies.
     */
    
    var Transport = _dereq_('../transport');
    var parser = _dereq_('engine.io-parser');
    var parseqs = _dereq_('parseqs');
    var inherit = _dereq_('component-inherit');
    var debug = _dereq_('debug')('engine.io-client:websocket');
    
    /**
     * `ws` exposes a WebSocket-compatible interface in
     * Node, or the `WebSocket` or `MozWebSocket` globals
     * in the browser.
     */
    
    var WebSocket = _dereq_('ws');
    
    /**
     * Module exports.
     */
    
    module.exports = WS;
    
    /**
     * WebSocket transport constructor.
     *
     * @api {Object} connection options
     * @api public
     */
    
    function WS(opts){
      var forceBase64 = (opts && opts.forceBase64);
      if (forceBase64) {
        this.supportsBinary = false;
      }
      this.perMessageDeflate = opts.perMessageDeflate;
      Transport.call(this, opts);
    }
    
    /**
     * Inherits from Transport.
     */
    
    inherit(WS, Transport);
    
    /**
     * Transport name.
     *
     * @api public
     */
    
    WS.prototype.name = 'websocket';
    
    /*
     * WebSockets support binary
     */
    
    WS.prototype.supportsBinary = true;
    
    /**
     * Opens socket.
     *
     * @api private
     */
    
    WS.prototype.doOpen = function(){
      if (!this.check()) {
        // let probe timeout
        return;
      }
    
      var self = this;
      var uri = this.uri();
      var protocols = void(0);
      var opts = {
        agent: this.agent,
        perMessageDeflate: this.perMessageDeflate
      };
    
      // SSL options for Node.js client
      opts.pfx = this.pfx;
      opts.key = this.key;
      opts.passphrase = this.passphrase;
      opts.cert = this.cert;
      opts.ca = this.ca;
      opts.ciphers = this.ciphers;
      opts.rejectUnauthorized = this.rejectUnauthorized;
    
      this.ws = new WebSocket(uri, protocols, opts);
    
      if (this.ws.binaryType === undefined) {
        this.supportsBinary = false;
      }
    
      this.ws.binaryType = 'arraybuffer';
      this.addEventListeners();
    };
    
    /**
     * Adds event listeners to the socket
     *
     * @api private
     */
    
    WS.prototype.addEventListeners = function(){
      var self = this;
    
      this.ws.onopen = function(){
        self.onOpen();
      };
      this.ws.onclose = function(){
        self.onClose();
      };
      this.ws.onmessage = function(ev){
        self.onData(ev.data);
      };
      this.ws.onerror = function(e){
        self.onError('websocket error', e);
      };
    };
    
    /**
     * Override `onData` to use a timer on iOS.
     * See: https://gist.github.com/mloughran/2052006
     *
     * @api private
     */
    
    if ('undefined' != typeof navigator
      && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
      WS.prototype.onData = function(data){
        var self = this;
        setTimeout(function(){
          Transport.prototype.onData.call(self, data);
        }, 0);
      };
    }
    
    /**
     * Writes data to socket.
     *
     * @param {Array} array of packets.
     * @api private
     */
    
    WS.prototype.write = function(packets){
      var self = this;
      this.writable = false;
      // encodePacket efficient as it uses WS framing
      // no need for encodePayload
      for (var i = 0, l = packets.length; i < l; i++) {
        var packet = packets[i];
        parser.encodePacket(packet, this.supportsBinary, function(data) {
          //Sometimes the websocket has already been closed but the browser didn't
          //have a chance of informing us about it yet, in that case send will
          //throw an error
          try {
            self.ws.send(data, packet.options);
          } catch (e){
            debug('websocket closed before onclose event');
          }
        });
      }
    
      function ondrain() {
        self.writable = true;
        self.emit('drain');
      }
      // fake drain
      // defer to next tick to allow Socket to clear writeBuffer
      setTimeout(ondrain, 0);
    };
    
    /**
     * Called upon close
     *
     * @api private
     */
    
    WS.prototype.onClose = function(){
      Transport.prototype.onClose.call(this);
    };
    
    /**
     * Closes socket.
     *
     * @api private
     */
    
    WS.prototype.doClose = function(){
      if (typeof this.ws !== 'undefined') {
        this.ws.close();
      }
    };
    
    /**
     * Generates uri for connection.
     *
     * @api private
     */
    
    WS.prototype.uri = function(){
      var query = this.query || {};
      var schema = this.secure ? 'wss' : 'ws';
      var port = '';
    
      // avoid port if default for schema
      if (this.port && (('wss' == schema && this.port != 443)
        || ('ws' == schema && this.port != 80))) {
        port = ':' + this.port;
      }
    
      // append timestamp to URI
      if (this.timestampRequests) {
        query[this.timestampParam] = +new Date;
      }
    
      // communicate binary support capabilities
      if (!this.supportsBinary) {
        query.b64 = 1;
      }
    
      query = parseqs.encode(query);
    
      // prepend ? to query
      if (query.length) {
        query = '?' + query;
      }
    
      return schema + '://' + this.hostname + port + this.path + query;
    };
    
    /**
     * Feature detection for WebSocket.
     *
     * @return {Boolean} whether this transport is available.
     * @api public
     */
    
    WS.prototype.check = function(){
      return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
    };
    
    },{"../transport":14,"component-inherit":21,"debug":22,"engine.io-parser":25,"parseqs":35,"ws":37}],20:[function(_dereq_,module,exports){
    // browser shim for xmlhttprequest module
    var hasCORS = _dereq_('has-cors');
    
    module.exports = function(opts) {
      var xdomain = opts.xdomain;
    
      // scheme must be same when usign XDomainRequest
      // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
      var xscheme = opts.xscheme;
    
      // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
      // https://github.com/Automattic/engine.io-client/pull/217
      var enablesXDR = opts.enablesXDR;
    
      // XMLHttpRequest can be disabled on IE
      try {
        if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
          return new XMLHttpRequest();
        }
      } catch (e) { }
    
      // Use XDomainRequest for IE8 if enablesXDR is true
      // because loading bar keeps flashing when using jsonp-polling
      // https://github.com/yujiosaka/socke.io-ie8-loading-example
      try {
        if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
          return new XDomainRequest();
        }
      } catch (e) { }
    
      if (!xdomain) {
        try {
          return new ActiveXObject('Microsoft.XMLHTTP');
        } catch(e) { }
      }
    }
    
    },{"has-cors":40}],21:[function(_dereq_,module,exports){
    
    module.exports = function(a, b){
      var fn = function(){};
      fn.prototype = b.prototype;
      a.prototype = new fn;
      a.prototype.constructor = a;
    };
    },{}],22:[function(_dereq_,module,exports){
    
    /**
     * This is the web browser implementation of `debug()`.
     *
     * Expose `debug()` as the module.
     */
    
    exports = module.exports = _dereq_('./debug');
    exports.log = log;
    exports.formatArgs = formatArgs;
    exports.save = save;
    exports.load = load;
    exports.useColors = useColors;
    
    /**
     * Colors.
     */
    
    exports.colors = [
      'lightseagreen',
      'forestgreen',
      'goldenrod',
      'dodgerblue',
      'darkorchid',
      'crimson'
    ];
    
    /**
     * Currently only WebKit-based Web Inspectors, Firefox >= v31,
     * and the Firebug extension (any Firefox version) are known
     * to support "%c" CSS customizations.
     *
     * TODO: add a `localStorage` variable to explicitly enable/disable colors
     */
    
    function useColors() {
      // is webkit? http://stackoverflow.com/a/16459606/376773
      return ('WebkitAppearance' in document.documentElement.style) ||
        // is firebug? http://stackoverflow.com/a/398120/376773
        (window.console && (console.firebug || (console.exception && console.table))) ||
        // is firefox >= v31?
        // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
        (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
    }
    
    /**
     * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
     */
    
    exports.formatters.j = function(v) {
      return JSON.stringify(v);
    };
    
    
    /**
     * Colorize log arguments if enabled.
     *
     * @api public
     */
    
    function formatArgs() {
      var args = arguments;
      var useColors = this.useColors;
    
      args[0] = (useColors ? '%c' : '')
        + this.namespace
        + (useColors ? ' %c' : ' ')
        + args[0]
        + (useColors ? '%c ' : ' ')
        + '+' + exports.humanize(this.diff);
    
      if (!useColors) return args;
    
      var c = 'color: ' + this.color;
      args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));
    
      // the final "%c" is somewhat tricky, because there could be other
      // arguments passed either before or after the %c, so we need to
      // figure out the correct index to insert the CSS into
      var index = 0;
      var lastC = 0;
      args[0].replace(/%[a-z%]/g, function(match) {
        if ('%' === match) return;
        index++;
        if ('%c' === match) {
          // we only are interested in the *last* %c
          // (the user may have provided their own)
          lastC = index;
        }
      });
    
      args.splice(lastC, 0, c);
      return args;
    }
    
    /**
     * Invokes `console.log()` when available.
     * No-op when `console.log` is not a "function".
     *
     * @api public
     */
    
    function log() {
      // This hackery is required for IE8,
      // where the `console.log` function doesn't have 'apply'
      return 'object' == typeof console
        && 'function' == typeof console.log
        && Function.prototype.apply.call(console.log, console, arguments);
    }
    
    /**
     * Save `namespaces`.
     *
     * @param {String} namespaces
     * @api private
     */
    
    function save(namespaces) {
      try {
        if (null == namespaces) {
          localStorage.removeItem('debug');
        } else {
          localStorage.debug = namespaces;
        }
      } catch(e) {}
    }
    
    /**
     * Load `namespaces`.
     *
     * @return {String} returns the previously persisted debug modes
     * @api private
     */
    
    function load() {
      var r;
      try {
        r = localStorage.debug;
      } catch(e) {}
      return r;
    }
    
    /**
     * Enable namespaces listed in `localStorage.debug` initially.
     */
    
    exports.enable(load());
    
    },{"./debug":23}],23:[function(_dereq_,module,exports){
    
    /**
     * This is the common logic for both the Node.js and web browser
     * implementations of `debug()`.
     *
     * Expose `debug()` as the module.
     */
    
    exports = module.exports = debug;
    exports.coerce = coerce;
    exports.disable = disable;
    exports.enable = enable;
    exports.enabled = enabled;
    exports.humanize = _dereq_('ms');
    
    /**
     * The currently active debug mode names, and names to skip.
     */
    
    exports.names = [];
    exports.skips = [];
    
    /**
     * Map of special "%n" handling functions, for the debug "format" argument.
     *
     * Valid key names are a single, lowercased letter, i.e. "n".
     */
    
    exports.formatters = {};
    
    /**
     * Previously assigned color.
     */
    
    var prevColor = 0;
    
    /**
     * Previous log timestamp.
     */
    
    var prevTime;
    
    /**
     * Select a color.
     *
     * @return {Number}
     * @api private
     */
    
    function selectColor() {
      return exports.colors[prevColor++ % exports.colors.length];
    }
    
    /**
     * Create a debugger with the given `namespace`.
     *
     * @param {String} namespace
     * @return {Function}
     * @api public
     */
    
    function debug(namespace) {
    
      // define the `disabled` version
      function disabled() {
      }
      disabled.enabled = false;
    
      // define the `enabled` version
      function enabled() {
    
        var self = enabled;
    
        // set `diff` timestamp
        var curr = +new Date();
        var ms = curr - (prevTime || curr);
        self.diff = ms;
        self.prev = prevTime;
        self.curr = curr;
        prevTime = curr;
    
        // add the `color` if not set
        if (null == self.useColors) self.useColors = exports.useColors();
        if (null == self.color && self.useColors) self.color = selectColor();
    
        var args = Array.prototype.slice.call(arguments);
    
        args[0] = exports.coerce(args[0]);
    
        if ('string' !== typeof args[0]) {
          // anything else let's inspect with %o
          args = ['%o'].concat(args);
        }
    
        // apply any `formatters` transformations
        var index = 0;
        args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
          // if we encounter an escaped % then don't increase the array index
          if (match === '%') return match;
          index++;
          var formatter = exports.formatters[format];
          if ('function' === typeof formatter) {
            var val = args[index];
            match = formatter.call(self, val);
    
            // now we need to remove `args[index]` since it's inlined in the `format`
            args.splice(index, 1);
            index--;
          }
          return match;
        });
    
        if ('function' === typeof exports.formatArgs) {
          args = exports.formatArgs.apply(self, args);
        }
        var logFn = enabled.log || exports.log || console.log.bind(console);
        logFn.apply(self, args);
      }
      enabled.enabled = true;
    
      var fn = exports.enabled(namespace) ? enabled : disabled;
    
      fn.namespace = namespace;
    
      return fn;
    }
    
    /**
     * Enables a debug mode by namespaces. This can include modes
     * separated by a colon and wildcards.
     *
     * @param {String} namespaces
     * @api public
     */
    
    function enable(namespaces) {
      exports.save(namespaces);
    
      var split = (namespaces || '').split(/[\s,]+/);
      var len = split.length;
    
      for (var i = 0; i < len; i++) {
        if (!split[i]) continue; // ignore empty strings
        namespaces = split[i].replace(/\*/g, '.*?');
        if (namespaces[0] === '-') {
          exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
        } else {
          exports.names.push(new RegExp('^' + namespaces + '$'));
        }
      }
    }
    
    /**
     * Disable debug output.
     *
     * @api public
     */
    
    function disable() {
      exports.enable('');
    }
    
    /**
     * Returns true if the given mode name is enabled, false otherwise.
     *
     * @param {String} name
     * @return {Boolean}
     * @api public
     */
    
    function enabled(name) {
      var i, len;
      for (i = 0, len = exports.skips.length; i < len; i++) {
        if (exports.skips[i].test(name)) {
          return false;
        }
      }
      for (i = 0, len = exports.names.length; i < len; i++) {
        if (exports.names[i].test(name)) {
          return true;
        }
      }
      return false;
    }
    
    /**
     * Coerce `val`.
     *
     * @param {Mixed} val
     * @return {Mixed}
     * @api private
     */
    
    function coerce(val) {
      if (val instanceof Error) return val.stack || val.message;
      return val;
    }
    
    },{"ms":24}],24:[function(_dereq_,module,exports){
    /**
     * Helpers.
     */
    
    var s = 1000;
    var m = s * 60;
    var h = m * 60;
    var d = h * 24;
    var y = d * 365.25;
    
    /**
     * Parse or format the given `val`.
     *
     * Options:
     *
     *  - `long` verbose formatting [false]
     *
     * @param {String|Number} val
     * @param {Object} options
     * @return {String|Number}
     * @api public
     */
    
    module.exports = function(val, options){
      options = options || {};
      if ('string' == typeof val) return parse(val);
      return options.long
        ? long(val)
        : short(val);
    };
    
    /**
     * Parse the given `str` and return milliseconds.
     *
     * @param {String} str
     * @return {Number}
     * @api private
     */
    
    function parse(str) {
      var match = /^((?:\d+)?\.?\d+) *(ms|seconds?|s|minutes?|m|hours?|h|days?|d|years?|y)?$/i.exec(str);
      if (!match) return;
      var n = parseFloat(match[1]);
      var type = (match[2] || 'ms').toLowerCase();
      switch (type) {
        case 'years':
        case 'year':
        case 'y':
          return n * y;
        case 'days':
        case 'day':
        case 'd':
          return n * d;
        case 'hours':
        case 'hour':
        case 'h':
          return n * h;
        case 'minutes':
        case 'minute':
        case 'm':
          return n * m;
        case 'seconds':
        case 'second':
        case 's':
          return n * s;
        case 'ms':
          return n;
      }
    }
    
    /**
     * Short format for `ms`.
     *
     * @param {Number} ms
     * @return {String}
     * @api private
     */
    
    function short(ms) {
      if (ms >= d) return Math.round(ms / d) + 'd';
      if (ms >= h) return Math.round(ms / h) + 'h';
      if (ms >= m) return Math.round(ms / m) + 'm';
      if (ms >= s) return Math.round(ms / s) + 's';
      return ms + 'ms';
    }
    
    /**
     * Long format for `ms`.
     *
     * @param {Number} ms
     * @return {String}
     * @api private
     */
    
    function long(ms) {
      return plural(ms, d, 'day')
        || plural(ms, h, 'hour')
        || plural(ms, m, 'minute')
        || plural(ms, s, 'second')
        || ms + ' ms';
    }
    
    /**
     * Pluralization helper.
     */
    
    function plural(ms, n, name) {
      if (ms < n) return;
      if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
      return Math.ceil(ms / n) + ' ' + name + 's';
    }
    
    },{}],25:[function(_dereq_,module,exports){
    (function (global){
    /**
     * Module dependencies.
     */
    
    var keys = _dereq_('./keys');
    var hasBinary = _dereq_('has-binary');
    var sliceBuffer = _dereq_('arraybuffer.slice');
    var base64encoder = _dereq_('base64-arraybuffer');
    var after = _dereq_('after');
    var utf8 = _dereq_('utf8');
    
    /**
     * Check if we are running an android browser. That requires us to use
     * ArrayBuffer with polling transports...
     *
     * http://ghinda.net/jpeg-blob-ajax-android/
     */
    
    var isAndroid = navigator.userAgent.match(/Android/i);
    
    /**
     * Check if we are running in PhantomJS.
     * Uploading a Blob with PhantomJS does not work correctly, as reported here:
     * https://github.com/ariya/phantomjs/issues/11395
     * @type boolean
     */
    var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);
    
    /**
     * When true, avoids using Blobs to encode payloads.
     * @type boolean
     */
    var dontSendBlobs = isAndroid || isPhantomJS;
    
    /**
     * Current protocol version.
     */
    
    exports.protocol = 3;
    
    /**
     * Packet types.
     */
    
    var packets = exports.packets = {
        open:     0    // non-ws
      , close:    1    // non-ws
      , ping:     2
      , pong:     3
      , message:  4
      , upgrade:  5
      , noop:     6
    };
    
    var packetslist = keys(packets);
    
    /**
     * Premade error packet.
     */
    
    var err = { type: 'error', data: 'parser error' };
    
    /**
     * Create a blob api even for blob builder when vendor prefixes exist
     */
    
    var Blob = _dereq_('blob');
    
    /**
     * Encodes a packet.
     *
     *     <packet type id> [ <data> ]
     *
     * Example:
     *
     *     5hello world
     *     3
     *     4
     *
     * Binary is encoded in an identical principle
     *
     * @api private
     */
    
    exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
      if ('function' == typeof supportsBinary) {
        callback = supportsBinary;
        supportsBinary = false;
      }
    
      if ('function' == typeof utf8encode) {
        callback = utf8encode;
        utf8encode = null;
      }
    
      var data = (packet.data === undefined)
        ? undefined
        : packet.data.buffer || packet.data;
    
      if (global.ArrayBuffer && data instanceof ArrayBuffer) {
        return encodeArrayBuffer(packet, supportsBinary, callback);
      } else if (Blob && data instanceof global.Blob) {
        return encodeBlob(packet, supportsBinary, callback);
      }
    
      // might be an object with { base64: true, data: dataAsBase64String }
      if (data && data.base64) {
        return encodeBase64Object(packet, callback);
      }
    
      // Sending data as a utf-8 string
      var encoded = packets[packet.type];
    
      // data fragment is optional
      if (undefined !== packet.data) {
        encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
      }
    
      return callback('' + encoded);
    
    };
    
    function encodeBase64Object(packet, callback) {
      // packet data is an object { base64: true, data: dataAsBase64String }
      var message = 'b' + exports.packets[packet.type] + packet.data.data;
      return callback(message);
    }
    
    /**
     * Encode packet helpers for binary types
     */
    
    function encodeArrayBuffer(packet, supportsBinary, callback) {
      if (!supportsBinary) {
        return exports.encodeBase64Packet(packet, callback);
      }
    
      var data = packet.data;
      var contentArray = new Uint8Array(data);
      var resultBuffer = new Uint8Array(1 + data.byteLength);
    
      resultBuffer[0] = packets[packet.type];
      for (var i = 0; i < contentArray.length; i++) {
        resultBuffer[i+1] = contentArray[i];
      }
    
      return callback(resultBuffer.buffer);
    }
    
    function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
      if (!supportsBinary) {
        return exports.encodeBase64Packet(packet, callback);
      }
    
      var fr = new FileReader();
      fr.onload = function() {
        packet.data = fr.result;
        exports.encodePacket(packet, supportsBinary, true, callback);
      };
      return fr.readAsArrayBuffer(packet.data);
    }
    
    function encodeBlob(packet, supportsBinary, callback) {
      if (!supportsBinary) {
        return exports.encodeBase64Packet(packet, callback);
      }
    
      if (dontSendBlobs) {
        return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
      }
    
      var length = new Uint8Array(1);
      length[0] = packets[packet.type];
      var blob = new Blob([length.buffer, packet.data]);
    
      return callback(blob);
    }
    
    /**
     * Encodes a packet with binary data in a base64 string
     *
     * @param {Object} packet, has `type` and `data`
     * @return {String} base64 encoded message
     */
    
    exports.encodeBase64Packet = function(packet, callback) {
      var message = 'b' + exports.packets[packet.type];
      if (Blob && packet.data instanceof Blob) {
        var fr = new FileReader();
        fr.onload = function() {
          var b64 = fr.result.split(',')[1];
          callback(message + b64);
        };
        return fr.readAsDataURL(packet.data);
      }
    
      var b64data;
      try {
        b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
      } catch (e) {
        // iPhone Safari doesn't let you apply with typed arrays
        var typed = new Uint8Array(packet.data);
        var basic = new Array(typed.length);
        for (var i = 0; i < typed.length; i++) {
          basic[i] = typed[i];
        }
        b64data = String.fromCharCode.apply(null, basic);
      }
      message += global.btoa(b64data);
      return callback(message);
    };
    
    /**
     * Decodes a packet. Changes format to Blob if requested.
     *
     * @return {Object} with `type` and `data` (if any)
     * @api private
     */
    
    exports.decodePacket = function (data, binaryType, utf8decode) {
      // String data
      if (typeof data == 'string' || data === undefined) {
        if (data.charAt(0) == 'b') {
          return exports.decodeBase64Packet(data.substr(1), binaryType);
        }
    
        if (utf8decode) {
          try {
            data = utf8.decode(data);
          } catch (e) {
            return err;
          }
        }
        var type = data.charAt(0);
    
        if (Number(type) != type || !packetslist[type]) {
          return err;
        }
    
        if (data.length > 1) {
          return { type: packetslist[type], data: data.substring(1) };
        } else {
          return { type: packetslist[type] };
        }
      }
    
      var asArray = new Uint8Array(data);
      var type = asArray[0];
      var rest = sliceBuffer(data, 1);
      if (Blob && binaryType === 'blob') {
        rest = new Blob([rest]);
      }
      return { type: packetslist[type], data: rest };
    };
    
    /**
     * Decodes a packet encoded in a base64 string
     *
     * @param {String} base64 encoded message
     * @return {Object} with `type` and `data` (if any)
     */
    
    exports.decodeBase64Packet = function(msg, binaryType) {
      var type = packetslist[msg.charAt(0)];
      if (!global.ArrayBuffer) {
        return { type: type, data: { base64: true, data: msg.substr(1) } };
      }
    
      var data = base64encoder.decode(msg.substr(1));
    
      if (binaryType === 'blob' && Blob) {
        data = new Blob([data]);
      }
    
      return { type: type, data: data };
    };
    
    /**
     * Encodes multiple messages (payload).
     *
     *     <length>:data
     *
     * Example:
     *
     *     11:hello world2:hi
     *
     * If any contents are binary, they will be encoded as base64 strings. Base64
     * encoded strings are marked with a b before the length specifier
     *
     * @param {Array} packets
     * @api private
     */
    
    exports.encodePayload = function (packets, supportsBinary, callback) {
      if (typeof supportsBinary == 'function') {
        callback = supportsBinary;
        supportsBinary = null;
      }
    
      var isBinary = hasBinary(packets);
    
      if (supportsBinary && isBinary) {
        if (Blob && !dontSendBlobs) {
          return exports.encodePayloadAsBlob(packets, callback);
        }
    
        return exports.encodePayloadAsArrayBuffer(packets, callback);
      }
    
      if (!packets.length) {
        return callback('0:');
      }
    
      function setLengthHeader(message) {
        return message.length + ':' + message;
      }
    
      function encodeOne(packet, doneCallback) {
        exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
          doneCallback(null, setLengthHeader(message));
        });
      }
    
      map(packets, encodeOne, function(err, results) {
        return callback(results.join(''));
      });
    };
    
    /**
     * Async array map using after
     */
    
    function map(ary, each, done) {
      var result = new Array(ary.length);
      var next = after(ary.length, done);
    
      var eachWithIndex = function(i, el, cb) {
        each(el, function(error, msg) {
          result[i] = msg;
          cb(error, result);
        });
      };
    
      for (var i = 0; i < ary.length; i++) {
        eachWithIndex(i, ary[i], next);
      }
    }
    
    /*
     * Decodes data when a payload is maybe expected. Possible binary contents are
     * decoded from their base64 representation
     *
     * @param {String} data, callback method
     * @api public
     */
    
    exports.decodePayload = function (data, binaryType, callback) {
      if (typeof data != 'string') {
        return exports.decodePayloadAsBinary(data, binaryType, callback);
      }
    
      if (typeof binaryType === 'function') {
        callback = binaryType;
        binaryType = null;
      }
    
      var packet;
      if (data == '') {
        // parser error - ignoring payload
        return callback(err, 0, 1);
      }
    
      var length = ''
        , n, msg;
    
      for (var i = 0, l = data.length; i < l; i++) {
        var chr = data.charAt(i);
    
        if (':' != chr) {
          length += chr;
        } else {
          if ('' == length || (length != (n = Number(length)))) {
            // parser error - ignoring payload
            return callback(err, 0, 1);
          }
    
          msg = data.substr(i + 1, n);
    
          if (length != msg.length) {
            // parser error - ignoring payload
            return callback(err, 0, 1);
          }
    
          if (msg.length) {
            packet = exports.decodePacket(msg, binaryType, true);
    
            if (err.type == packet.type && err.data == packet.data) {
              // parser error in individual packet - ignoring payload
              return callback(err, 0, 1);
            }
    
            var ret = callback(packet, i + n, l);
            if (false === ret) return;
          }
    
          // advance cursor
          i += n;
          length = '';
        }
      }
    
      if (length != '') {
        // parser error - ignoring payload
        return callback(err, 0, 1);
      }
    
    };
    
    /**
     * Encodes multiple messages (payload) as binary.
     *
     * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
     * 255><data>
     *
     * Example:
     * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
     *
     * @param {Array} packets
     * @return {ArrayBuffer} encoded payload
     * @api private
     */
    
    exports.encodePayloadAsArrayBuffer = function(packets, callback) {
      if (!packets.length) {
        return callback(new ArrayBuffer(0));
      }
    
      function encodeOne(packet, doneCallback) {
        exports.encodePacket(packet, true, true, function(data) {
          return doneCallback(null, data);
        });
      }
    
      map(packets, encodeOne, function(err, encodedPackets) {
        var totalLength = encodedPackets.reduce(function(acc, p) {
          var len;
          if (typeof p === 'string'){
            len = p.length;
          } else {
            len = p.byteLength;
          }
          return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
        }, 0);
    
        var resultArray = new Uint8Array(totalLength);
    
        var bufferIndex = 0;
        encodedPackets.forEach(function(p) {
          var isString = typeof p === 'string';
          var ab = p;
          if (isString) {
            var view = new Uint8Array(p.length);
            for (var i = 0; i < p.length; i++) {
              view[i] = p.charCodeAt(i);
            }
            ab = view.buffer;
          }
    
          if (isString) { // not true binary
            resultArray[bufferIndex++] = 0;
          } else { // true binary
            resultArray[bufferIndex++] = 1;
          }
    
          var lenStr = ab.byteLength.toString();
          for (var i = 0; i < lenStr.length; i++) {
            resultArray[bufferIndex++] = parseInt(lenStr[i]);
          }
          resultArray[bufferIndex++] = 255;
    
          var view = new Uint8Array(ab);
          for (var i = 0; i < view.length; i++) {
            resultArray[bufferIndex++] = view[i];
          }
        });
    
        return callback(resultArray.buffer);
      });
    };
    
    /**
     * Encode as Blob
     */
    
    exports.encodePayloadAsBlob = function(packets, callback) {
      function encodeOne(packet, doneCallback) {
        exports.encodePacket(packet, true, true, function(encoded) {
          var binaryIdentifier = new Uint8Array(1);
          binaryIdentifier[0] = 1;
          if (typeof encoded === 'string') {
            var view = new Uint8Array(encoded.length);
            for (var i = 0; i < encoded.length; i++) {
              view[i] = encoded.charCodeAt(i);
            }
            encoded = view.buffer;
            binaryIdentifier[0] = 0;
          }
    
          var len = (encoded instanceof ArrayBuffer)
            ? encoded.byteLength
            : encoded.size;
    
          var lenStr = len.toString();
          var lengthAry = new Uint8Array(lenStr.length + 1);
          for (var i = 0; i < lenStr.length; i++) {
            lengthAry[i] = parseInt(lenStr[i]);
          }
          lengthAry[lenStr.length] = 255;
    
          if (Blob) {
            var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
            doneCallback(null, blob);
          }
        });
      }
    
      map(packets, encodeOne, function(err, results) {
        return callback(new Blob(results));
      });
    };
    
    /*
     * Decodes data when a payload is maybe expected. Strings are decoded by
     * interpreting each byte as a key code for entries marked to start with 0. See
     * description of encodePayloadAsBinary
     *
     * @param {ArrayBuffer} data, callback method
     * @api public
     */
    
    exports.decodePayloadAsBinary = function (data, binaryType, callback) {
      if (typeof binaryType === 'function') {
        callback = binaryType;
        binaryType = null;
      }
    
      var bufferTail = data;
      var buffers = [];
    
      var numberTooLong = false;
      while (bufferTail.byteLength > 0) {
        var tailArray = new Uint8Array(bufferTail);
        var isString = tailArray[0] === 0;
        var msgLength = '';
    
        for (var i = 1; ; i++) {
          if (tailArray[i] == 255) break;
    
          if (msgLength.length > 310) {
            numberTooLong = true;
            break;
          }
    
          msgLength += tailArray[i];
        }
    
        if(numberTooLong) return callback(err, 0, 1);
    
        bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
        msgLength = parseInt(msgLength);
    
        var msg = sliceBuffer(bufferTail, 0, msgLength);
        if (isString) {
          try {
            msg = String.fromCharCode.apply(null, new Uint8Array(msg));
          } catch (e) {
            // iPhone Safari doesn't let you apply to typed arrays
            var typed = new Uint8Array(msg);
            msg = '';
            for (var i = 0; i < typed.length; i++) {
              msg += String.fromCharCode(typed[i]);
            }
          }
        }
    
        buffers.push(msg);
        bufferTail = sliceBuffer(bufferTail, msgLength);
      }
    
      var total = buffers.length;
      buffers.forEach(function(buffer, i) {
        callback(exports.decodePacket(buffer, binaryType, true), i, total);
      });
    };
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./keys":26,"after":27,"arraybuffer.slice":28,"base64-arraybuffer":29,"blob":30,"has-binary":31,"utf8":33}],26:[function(_dereq_,module,exports){
    
    /**
     * Gets the keys for an object.
     *
     * @return {Array} keys
     * @api private
     */
    
    module.exports = Object.keys || function keys (obj){
      var arr = [];
      var has = Object.prototype.hasOwnProperty;
    
      for (var i in obj) {
        if (has.call(obj, i)) {
          arr.push(i);
        }
      }
      return arr;
    };
    
    },{}],27:[function(_dereq_,module,exports){
    module.exports = after
    
    function after(count, callback, err_cb) {
        var bail = false
        err_cb = err_cb || noop
        proxy.count = count
    
        return (count === 0) ? callback() : proxy
    
        function proxy(err, result) {
            if (proxy.count <= 0) {
                throw new Error('after called too many times')
            }
            --proxy.count
    
            // after first error, rest are passed to err_cb
            if (err) {
                bail = true
                callback(err)
                // future error callbacks will go to error handler
                callback = err_cb
            } else if (proxy.count === 0 && !bail) {
                callback(null, result)
            }
        }
    }
    
    function noop() {}
    
    },{}],28:[function(_dereq_,module,exports){
    /**
     * An abstraction for slicing an arraybuffer even when
     * ArrayBuffer.prototype.slice is not supported
     *
     * @api public
     */
    
    module.exports = function(arraybuffer, start, end) {
      var bytes = arraybuffer.byteLength;
      start = start || 0;
      end = end || bytes;
    
      if (arraybuffer.slice) { return arraybuffer.slice(start, end); }
    
      if (start < 0) { start += bytes; }
      if (end < 0) { end += bytes; }
      if (end > bytes) { end = bytes; }
    
      if (start >= bytes || start >= end || bytes === 0) {
        return new ArrayBuffer(0);
      }
    
      var abv = new Uint8Array(arraybuffer);
      var result = new Uint8Array(end - start);
      for (var i = start, ii = 0; i < end; i++, ii++) {
        result[ii] = abv[i];
      }
      return result.buffer;
    };
    
    },{}],29:[function(_dereq_,module,exports){
    /*
     * base64-arraybuffer
     * https://github.com/niklasvh/base64-arraybuffer
     *
     * Copyright (c) 2012 Niklas von Hertzen
     * Licensed under the MIT license.
     */
    (function(chars){
      "use strict";
    
      exports.encode = function(arraybuffer) {
        var bytes = new Uint8Array(arraybuffer),
        i, len = bytes.length, base64 = "";
    
        for (i = 0; i < len; i+=3) {
          base64 += chars[bytes[i] >> 2];
          base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
          base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
          base64 += chars[bytes[i + 2] & 63];
        }
    
        if ((len % 3) === 2) {
          base64 = base64.substring(0, base64.length - 1) + "=";
        } else if (len % 3 === 1) {
          base64 = base64.substring(0, base64.length - 2) + "==";
        }
    
        return base64;
      };
    
      exports.decode =  function(base64) {
        var bufferLength = base64.length * 0.75,
        len = base64.length, i, p = 0,
        encoded1, encoded2, encoded3, encoded4;
    
        if (base64[base64.length - 1] === "=") {
          bufferLength--;
          if (base64[base64.length - 2] === "=") {
            bufferLength--;
          }
        }
    
        var arraybuffer = new ArrayBuffer(bufferLength),
        bytes = new Uint8Array(arraybuffer);
    
        for (i = 0; i < len; i+=4) {
          encoded1 = chars.indexOf(base64[i]);
          encoded2 = chars.indexOf(base64[i+1]);
          encoded3 = chars.indexOf(base64[i+2]);
          encoded4 = chars.indexOf(base64[i+3]);
    
          bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
          bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
          bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
        }
    
        return arraybuffer;
      };
    })("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
    
    },{}],30:[function(_dereq_,module,exports){
    (function (global){
    /**
     * Create a blob builder even when vendor prefixes exist
     */
    
    var BlobBuilder = global.BlobBuilder
      || global.WebKitBlobBuilder
      || global.MSBlobBuilder
      || global.MozBlobBuilder;
    
    /**
     * Check if Blob constructor is supported
     */
    
    var blobSupported = (function() {
      try {
        var b = new Blob(['hi']);
        return b.size == 2;
      } catch(e) {
        return false;
      }
    })();
    
    /**
     * Check if BlobBuilder is supported
     */
    
    var blobBuilderSupported = BlobBuilder
      && BlobBuilder.prototype.append
      && BlobBuilder.prototype.getBlob;
    
    function BlobBuilderConstructor(ary, options) {
      options = options || {};
    
      var bb = new BlobBuilder();
      for (var i = 0; i < ary.length; i++) {
        bb.append(ary[i]);
      }
      return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
    };
    
    module.exports = (function() {
      if (blobSupported) {
        return global.Blob;
      } else if (blobBuilderSupported) {
        return BlobBuilderConstructor;
      } else {
        return undefined;
      }
    })();
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{}],31:[function(_dereq_,module,exports){
    (function (global){
    
    /*
     * Module requirements.
     */
    
    var isArray = _dereq_('isarray');
    
    /**
     * Module exports.
     */
    
    module.exports = hasBinary;
    
    /**
     * Checks for binary data.
     *
     * Right now only Buffer and ArrayBuffer are supported..
     *
     * @param {Object} anything
     * @api public
     */
    
    function hasBinary(data) {
    
      function _hasBinary(obj) {
        if (!obj) return false;
    
        if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
             (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
             (global.Blob && obj instanceof Blob) ||
             (global.File && obj instanceof File)
            ) {
          return true;
        }
    
        if (isArray(obj)) {
          for (var i = 0; i < obj.length; i++) {
              if (_hasBinary(obj[i])) {
                  return true;
              }
          }
        } else if (obj && 'object' == typeof obj) {
          if (obj.toJSON) {
            obj = obj.toJSON();
          }
    
          for (var key in obj) {
            if (obj.hasOwnProperty(key) && _hasBinary(obj[key])) {
              return true;
            }
          }
        }
    
        return false;
      }
    
      return _hasBinary(data);
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"isarray":32}],32:[function(_dereq_,module,exports){
    module.exports = Array.isArray || function (arr) {
      return Object.prototype.toString.call(arr) == '[object Array]';
    };
    
    },{}],33:[function(_dereq_,module,exports){
    (function (global){
    /*! http://mths.be/utf8js v2.0.0 by @mathias */
    ;(function(root) {
    
        // Detect free variables `exports`
        var freeExports = typeof exports == 'object' && exports;
    
        // Detect free variable `module`
        var freeModule = typeof module == 'object' && module &&
            module.exports == freeExports && module;
    
        // Detect free variable `global`, from Node.js or Browserified code,
        // and use it as `root`
        var freeGlobal = typeof global == 'object' && global;
        if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
            root = freeGlobal;
        }
    
        /*--------------------------------------------------------------------------*/
    
        var stringFromCharCode = String.fromCharCode;
    
        // Taken from http://mths.be/punycode
        function ucs2decode(string) {
            var output = [];
            var counter = 0;
            var length = string.length;
            var value;
            var extra;
            while (counter < length) {
                value = string.charCodeAt(counter++);
                if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
                    // high surrogate, and there is a next character
                    extra = string.charCodeAt(counter++);
                    if ((extra & 0xFC00) == 0xDC00) { // low surrogate
                        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
                    } else {
                        // unmatched surrogate; only append this code unit, in case the next
                        // code unit is the high surrogate of a surrogate pair
                        output.push(value);
                        counter--;
                    }
                } else {
                    output.push(value);
                }
            }
            return output;
        }
    
        // Taken from http://mths.be/punycode
        function ucs2encode(array) {
            var length = array.length;
            var index = -1;
            var value;
            var output = '';
            while (++index < length) {
                value = array[index];
                if (value > 0xFFFF) {
                    value -= 0x10000;
                    output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
                    value = 0xDC00 | value & 0x3FF;
                }
                output += stringFromCharCode(value);
            }
            return output;
        }
    
        /*--------------------------------------------------------------------------*/
    
        function createByte(codePoint, shift) {
            return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
        }
    
        function encodeCodePoint(codePoint) {
            if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
                return stringFromCharCode(codePoint);
            }
            var symbol = '';
            if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
                symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
            }
            else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
                symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
                symbol += createByte(codePoint, 6);
            }
            else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
                symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
                symbol += createByte(codePoint, 12);
                symbol += createByte(codePoint, 6);
            }
            symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
            return symbol;
        }
    
        function utf8encode(string) {
            var codePoints = ucs2decode(string);
    
            // console.log(JSON.stringify(codePoints.map(function(x) {
            // 	return 'U+' + x.toString(16).toUpperCase();
            // })));
    
            var length = codePoints.length;
            var index = -1;
            var codePoint;
            var byteString = '';
            while (++index < length) {
                codePoint = codePoints[index];
                byteString += encodeCodePoint(codePoint);
            }
            return byteString;
        }
    
        /*--------------------------------------------------------------------------*/
    
        function readContinuationByte() {
            if (byteIndex >= byteCount) {
                throw Error('Invalid byte index');
            }
    
            var continuationByte = byteArray[byteIndex] & 0xFF;
            byteIndex++;
    
            if ((continuationByte & 0xC0) == 0x80) {
                return continuationByte & 0x3F;
            }
    
            // If we end up here, it’s not a continuation byte
            throw Error('Invalid continuation byte');
        }
    
        function decodeSymbol() {
            var byte1;
            var byte2;
            var byte3;
            var byte4;
            var codePoint;
    
            if (byteIndex > byteCount) {
                throw Error('Invalid byte index');
            }
    
            if (byteIndex == byteCount) {
                return false;
            }
    
            // Read first byte
            byte1 = byteArray[byteIndex] & 0xFF;
            byteIndex++;
    
            // 1-byte sequence (no continuation bytes)
            if ((byte1 & 0x80) == 0) {
                return byte1;
            }
    
            // 2-byte sequence
            if ((byte1 & 0xE0) == 0xC0) {
                var byte2 = readContinuationByte();
                codePoint = ((byte1 & 0x1F) << 6) | byte2;
                if (codePoint >= 0x80) {
                    return codePoint;
                } else {
                    throw Error('Invalid continuation byte');
                }
            }
    
            // 3-byte sequence (may include unpaired surrogates)
            if ((byte1 & 0xF0) == 0xE0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
                if (codePoint >= 0x0800) {
                    return codePoint;
                } else {
                    throw Error('Invalid continuation byte');
                }
            }
    
            // 4-byte sequence
            if ((byte1 & 0xF8) == 0xF0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                byte4 = readContinuationByte();
                codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
                    (byte3 << 0x06) | byte4;
                if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
                    return codePoint;
                }
            }
    
            throw Error('Invalid UTF-8 detected');
        }
    
        var byteArray;
        var byteCount;
        var byteIndex;
        function utf8decode(byteString) {
            byteArray = ucs2decode(byteString);
            byteCount = byteArray.length;
            byteIndex = 0;
            var codePoints = [];
            var tmp;
            while ((tmp = decodeSymbol()) !== false) {
                codePoints.push(tmp);
            }
            return ucs2encode(codePoints);
        }
    
        /*--------------------------------------------------------------------------*/
    
        var utf8 = {
            'version': '2.0.0',
            'encode': utf8encode,
            'decode': utf8decode
        };
    
        // Some AMD build optimizers, like r.js, check for specific condition patterns
        // like the following:
        if (
            typeof define == 'function' &&
            typeof define.amd == 'object' &&
            define.amd
        ) {
            define(function() {
                return utf8;
            });
        }	else if (freeExports && !freeExports.nodeType) {
            if (freeModule) { // in Node.js or RingoJS v0.8.0+
                freeModule.exports = utf8;
            } else { // in Narwhal or RingoJS v0.7.0-
                var object = {};
                var hasOwnProperty = object.hasOwnProperty;
                for (var key in utf8) {
                    hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
                }
            }
        } else { // in Rhino or a web browser
            root.utf8 = utf8;
        }
    
    }(this));
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{}],34:[function(_dereq_,module,exports){
    (function (global){
    /**
     * JSON parse.
     *
     * @see Based on jQuery#parseJSON (MIT) and JSON2
     * @api private
     */
    
    var rvalidchars = /^[\],:{}\s]*$/;
    var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
    var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
    var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
    var rtrimLeft = /^\s+/;
    var rtrimRight = /\s+$/;
    
    module.exports = function parsejson(data) {
      if ('string' != typeof data || !data) {
        return null;
      }
    
      data = data.replace(rtrimLeft, '').replace(rtrimRight, '');
    
      // Attempt to parse using the native JSON parser first
      if (global.JSON && JSON.parse) {
        return JSON.parse(data);
      }
    
      if (rvalidchars.test(data.replace(rvalidescape, '@')
          .replace(rvalidtokens, ']')
          .replace(rvalidbraces, ''))) {
        return (new Function('return ' + data))();
      }
    };
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{}],35:[function(_dereq_,module,exports){
    /**
     * Compiles a querystring
     * Returns string representation of the object
     *
     * @param {Object}
     * @api private
     */
    
    exports.encode = function (obj) {
      var str = '';
    
      for (var i in obj) {
        if (obj.hasOwnProperty(i)) {
          if (str.length) str += '&';
          str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
        }
      }
    
      return str;
    };
    
    /**
     * Parses a simple querystring into an object
     *
     * @param {String} qs
     * @api private
     */
    
    exports.decode = function(qs){
      var qry = {};
      var pairs = qs.split('&');
      for (var i = 0, l = pairs.length; i < l; i++) {
        var pair = pairs[i].split('=');
        qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
      }
      return qry;
    };
    
    },{}],36:[function(_dereq_,module,exports){
    /**
     * Parses an URI
     *
     * @author Steven Levithan <stevenlevithan.com> (MIT license)
     * @api private
     */
    
    var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
    
    var parts = [
        'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
    ];
    
    module.exports = function parseuri(str) {
        var src = str,
            b = str.indexOf('['),
            e = str.indexOf(']');
    
        if (b != -1 && e != -1) {
            str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
        }
    
        var m = re.exec(str || ''),
            uri = {},
            i = 14;
    
        while (i--) {
            uri[parts[i]] = m[i] || '';
        }
    
        if (b != -1 && e != -1) {
            uri.source = src;
            uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
            uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
            uri.ipv6uri = true;
        }
    
        return uri;
    };
    
    },{}],37:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var global = (function() { return this; })();
    
    /**
     * WebSocket constructor.
     */
    
    var WebSocket = global.WebSocket || global.MozWebSocket;
    
    /**
     * Module exports.
     */
    
    module.exports = WebSocket ? ws : null;
    
    /**
     * WebSocket constructor.
     *
     * The third `opts` options object gets ignored in web browsers, since it's
     * non-standard, and throws a TypeError if passed to the constructor.
     * See: https://github.com/einaros/ws/issues/227
     *
     * @param {String} uri
     * @param {Array} protocols (optional)
     * @param {Object) opts (optional)
     * @api public
     */
    
    function ws(uri, protocols, opts) {
      var instance;
      if (protocols) {
        instance = new WebSocket(uri, protocols);
      } else {
        instance = new WebSocket(uri);
      }
      return instance;
    }
    
    if (WebSocket) ws.prototype = WebSocket.prototype;
    
    },{}],38:[function(_dereq_,module,exports){
    (function (global){
    
    /*
     * Module requirements.
     */
    
    var isArray = _dereq_('isarray');
    
    /**
     * Module exports.
     */
    
    module.exports = hasBinary;
    
    /**
     * Checks for binary data.
     *
     * Right now only Buffer and ArrayBuffer are supported..
     *
     * @param {Object} anything
     * @api public
     */
    
    function hasBinary(data) {
    
      function _hasBinary(obj) {
        if (!obj) return false;
    
        if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
             (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
             (global.Blob && obj instanceof Blob) ||
             (global.File && obj instanceof File)
            ) {
          return true;
        }
    
        if (isArray(obj)) {
          for (var i = 0; i < obj.length; i++) {
              if (_hasBinary(obj[i])) {
                  return true;
              }
          }
        } else if (obj && 'object' == typeof obj) {
          if (obj.toJSON) {
            obj = obj.toJSON();
          }
    
          for (var key in obj) {
            if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
              return true;
            }
          }
        }
    
        return false;
      }
    
      return _hasBinary(data);
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"isarray":39}],39:[function(_dereq_,module,exports){
    module.exports=_dereq_(32)
    },{}],40:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var global = _dereq_('global');
    
    /**
     * Module exports.
     *
     * Logic borrowed from Modernizr:
     *
     *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
     */
    
    try {
      module.exports = 'XMLHttpRequest' in global &&
        'withCredentials' in new global.XMLHttpRequest();
    } catch (err) {
      // if XMLHttp support is disabled in IE then it will throw
      // when trying to create
      module.exports = false;
    }
    
    },{"global":41}],41:[function(_dereq_,module,exports){
    
    /**
     * Returns `this`. Execute this without a "context" (i.e. without it being
     * attached to an object of the left-hand side), and `this` points to the
     * "global" scope of the current JS execution.
     */
    
    module.exports = (function () { return this; })();
    
    },{}],42:[function(_dereq_,module,exports){
    
    var indexOf = [].indexOf;
    
    module.exports = function(arr, obj){
      if (indexOf) return arr.indexOf(obj);
      for (var i = 0; i < arr.length; ++i) {
        if (arr[i] === obj) return i;
      }
      return -1;
    };
    },{}],43:[function(_dereq_,module,exports){
    
    /**
     * HOP ref.
     */
    
    var has = Object.prototype.hasOwnProperty;
    
    /**
     * Return own keys in `obj`.
     *
     * @param {Object} obj
     * @return {Array}
     * @api public
     */
    
    exports.keys = Object.keys || function(obj){
      var keys = [];
      for (var key in obj) {
        if (has.call(obj, key)) {
          keys.push(key);
        }
      }
      return keys;
    };
    
    /**
     * Return own values in `obj`.
     *
     * @param {Object} obj
     * @return {Array}
     * @api public
     */
    
    exports.values = function(obj){
      var vals = [];
      for (var key in obj) {
        if (has.call(obj, key)) {
          vals.push(obj[key]);
        }
      }
      return vals;
    };
    
    /**
     * Merge `b` into `a`.
     *
     * @param {Object} a
     * @param {Object} b
     * @return {Object} a
     * @api public
     */
    
    exports.merge = function(a, b){
      for (var key in b) {
        if (has.call(b, key)) {
          a[key] = b[key];
        }
      }
      return a;
    };
    
    /**
     * Return length of `obj`.
     *
     * @param {Object} obj
     * @return {Number}
     * @api public
     */
    
    exports.length = function(obj){
      return exports.keys(obj).length;
    };
    
    /**
     * Check if `obj` is empty.
     *
     * @param {Object} obj
     * @return {Boolean}
     * @api public
     */
    
    exports.isEmpty = function(obj){
      return 0 == exports.length(obj);
    };
    },{}],44:[function(_dereq_,module,exports){
    /**
     * Parses an URI
     *
     * @author Steven Levithan <stevenlevithan.com> (MIT license)
     * @api private
     */
    
    var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
    
    var parts = [
        'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host'
      , 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
    ];
    
    module.exports = function parseuri(str) {
      var m = re.exec(str || '')
        , uri = {}
        , i = 14;
    
      while (i--) {
        uri[parts[i]] = m[i] || '';
      }
    
      return uri;
    };
    
    },{}],45:[function(_dereq_,module,exports){
    (function (global){
    /*global Blob,File*/
    
    /**
     * Module requirements
     */
    
    var isArray = _dereq_('isarray');
    var isBuf = _dereq_('./is-buffer');
    
    /**
     * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
     * Anything with blobs or files should be fed through removeBlobs before coming
     * here.
     *
     * @param {Object} packet - socket.io event packet
     * @return {Object} with deconstructed packet and list of buffers
     * @api public
     */
    
    exports.deconstructPacket = function(packet){
      var buffers = [];
      var packetData = packet.data;
    
      function _deconstructPacket(data) {
        if (!data) return data;
    
        if (isBuf(data)) {
          var placeholder = { _placeholder: true, num: buffers.length };
          buffers.push(data);
          return placeholder;
        } else if (isArray(data)) {
          var newData = new Array(data.length);
          for (var i = 0; i < data.length; i++) {
            newData[i] = _deconstructPacket(data[i]);
          }
          return newData;
        } else if ('object' == typeof data && !(data instanceof Date)) {
          var newData = {};
          for (var key in data) {
            newData[key] = _deconstructPacket(data[key]);
          }
          return newData;
        }
        return data;
      }
    
      var pack = packet;
      pack.data = _deconstructPacket(packetData);
      pack.attachments = buffers.length; // number of binary 'attachments'
      return {packet: pack, buffers: buffers};
    };
    
    /**
     * Reconstructs a binary packet from its placeholder packet and buffers
     *
     * @param {Object} packet - event packet with placeholders
     * @param {Array} buffers - binary buffers to put in placeholder positions
     * @return {Object} reconstructed packet
     * @api public
     */
    
    exports.reconstructPacket = function(packet, buffers) {
      var curPlaceHolder = 0;
    
      function _reconstructPacket(data) {
        if (data && data._placeholder) {
          var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
          return buf;
        } else if (isArray(data)) {
          for (var i = 0; i < data.length; i++) {
            data[i] = _reconstructPacket(data[i]);
          }
          return data;
        } else if (data && 'object' == typeof data) {
          for (var key in data) {
            data[key] = _reconstructPacket(data[key]);
          }
          return data;
        }
        return data;
      }
    
      packet.data = _reconstructPacket(packet.data);
      packet.attachments = undefined; // no longer useful
      return packet;
    };
    
    /**
     * Asynchronously removes Blobs or Files from data via
     * FileReader's readAsArrayBuffer method. Used before encoding
     * data as msgpack. Calls callback with the blobless data.
     *
     * @param {Object} data
     * @param {Function} callback
     * @api private
     */
    
    exports.removeBlobs = function(data, callback) {
      function _removeBlobs(obj, curKey, containingObject) {
        if (!obj) return obj;
    
        // convert any blob
        if ((global.Blob && obj instanceof Blob) ||
            (global.File && obj instanceof File)) {
          pendingBlobs++;
    
          // async filereader
          var fileReader = new FileReader();
          fileReader.onload = function() { // this.result == arraybuffer
            if (containingObject) {
              containingObject[curKey] = this.result;
            }
            else {
              bloblessData = this.result;
            }
    
            // if nothing pending its callback time
            if(! --pendingBlobs) {
              callback(bloblessData);
            }
          };
    
          fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
        } else if (isArray(obj)) { // handle array
          for (var i = 0; i < obj.length; i++) {
            _removeBlobs(obj[i], i, obj);
          }
        } else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
          for (var key in obj) {
            _removeBlobs(obj[key], key, obj);
          }
        }
      }
    
      var pendingBlobs = 0;
      var bloblessData = data;
      _removeBlobs(bloblessData);
      if (!pendingBlobs) {
        callback(bloblessData);
      }
    };
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{"./is-buffer":47,"isarray":48}],46:[function(_dereq_,module,exports){
    
    /**
     * Module dependencies.
     */
    
    var debug = _dereq_('debug')('socket.io-parser');
    var json = _dereq_('json3');
    var isArray = _dereq_('isarray');
    var Emitter = _dereq_('component-emitter');
    var binary = _dereq_('./binary');
    var isBuf = _dereq_('./is-buffer');
    
    /**
     * Protocol version.
     *
     * @api public
     */
    
    exports.protocol = 4;
    
    /**
     * Packet types.
     *
     * @api public
     */
    
    exports.types = [
      'CONNECT',
      'DISCONNECT',
      'EVENT',
      'BINARY_EVENT',
      'ACK',
      'BINARY_ACK',
      'ERROR'
    ];
    
    /**
     * Packet type `connect`.
     *
     * @api public
     */
    
    exports.CONNECT = 0;
    
    /**
     * Packet type `disconnect`.
     *
     * @api public
     */
    
    exports.DISCONNECT = 1;
    
    /**
     * Packet type `event`.
     *
     * @api public
     */
    
    exports.EVENT = 2;
    
    /**
     * Packet type `ack`.
     *
     * @api public
     */
    
    exports.ACK = 3;
    
    /**
     * Packet type `error`.
     *
     * @api public
     */
    
    exports.ERROR = 4;
    
    /**
     * Packet type 'binary event'
     *
     * @api public
     */
    
    exports.BINARY_EVENT = 5;
    
    /**
     * Packet type `binary ack`. For acks with binary arguments.
     *
     * @api public
     */
    
    exports.BINARY_ACK = 6;
    
    /**
     * Encoder constructor.
     *
     * @api public
     */
    
    exports.Encoder = Encoder;
    
    /**
     * Decoder constructor.
     *
     * @api public
     */
    
    exports.Decoder = Decoder;
    
    /**
     * A socket.io Encoder instance
     *
     * @api public
     */
    
    function Encoder() {}
    
    /**
     * Encode a packet as a single string if non-binary, or as a
     * buffer sequence, depending on packet type.
     *
     * @param {Object} obj - packet object
     * @param {Function} callback - function to handle encodings (likely engine.write)
     * @return Calls callback with Array of encodings
     * @api public
     */
    
    Encoder.prototype.encode = function(obj, callback){
      debug('encoding packet %j', obj);
    
      if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
        encodeAsBinary(obj, callback);
      }
      else {
        var encoding = encodeAsString(obj);
        callback([encoding]);
      }
    };
    
    /**
     * Encode packet as string.
     *
     * @param {Object} packet
     * @return {String} encoded
     * @api private
     */
    
    function encodeAsString(obj) {
      var str = '';
      var nsp = false;
    
      // first is type
      str += obj.type;
    
      // attachments if we have them
      if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
        str += obj.attachments;
        str += '-';
      }
    
      // if we have a namespace other than `/`
      // we append it followed by a comma `,`
      if (obj.nsp && '/' != obj.nsp) {
        nsp = true;
        str += obj.nsp;
      }
    
      // immediately followed by the id
      if (null != obj.id) {
        if (nsp) {
          str += ',';
          nsp = false;
        }
        str += obj.id;
      }
    
      // json data
      if (null != obj.data) {
        if (nsp) str += ',';
        str += json.stringify(obj.data);
      }
    
      debug('encoded %j as %s', obj, str);
      return str;
    }
    
    /**
     * Encode packet as 'buffer sequence' by removing blobs, and
     * deconstructing packet into object with placeholders and
     * a list of buffers.
     *
     * @param {Object} packet
     * @return {Buffer} encoded
     * @api private
     */
    
    function encodeAsBinary(obj, callback) {
    
      function writeEncoding(bloblessData) {
        var deconstruction = binary.deconstructPacket(bloblessData);
        var pack = encodeAsString(deconstruction.packet);
        var buffers = deconstruction.buffers;
    
        buffers.unshift(pack); // add packet info to beginning of data list
        callback(buffers); // write all the buffers
      }
    
      binary.removeBlobs(obj, writeEncoding);
    }
    
    /**
     * A socket.io Decoder instance
     *
     * @return {Object} decoder
     * @api public
     */
    
    function Decoder() {
      this.reconstructor = null;
    }
    
    /**
     * Mix in `Emitter` with Decoder.
     */
    
    Emitter(Decoder.prototype);
    
    /**
     * Decodes an ecoded packet string into packet JSON.
     *
     * @param {String} obj - encoded packet
     * @return {Object} packet
     * @api public
     */
    
    Decoder.prototype.add = function(obj) {
      var packet;
      if ('string' == typeof obj) {
        packet = decodeString(obj);
        if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
          this.reconstructor = new BinaryReconstructor(packet);
    
          // no attachments, labeled binary but no binary data to follow
          if (this.reconstructor.reconPack.attachments === 0) {
            this.emit('decoded', packet);
          }
        } else { // non-binary full packet
          this.emit('decoded', packet);
        }
      }
      else if (isBuf(obj) || obj.base64) { // raw binary data
        if (!this.reconstructor) {
          throw new Error('got binary data when not reconstructing a packet');
        } else {
          packet = this.reconstructor.takeBinaryData(obj);
          if (packet) { // received final buffer
            this.reconstructor = null;
            this.emit('decoded', packet);
          }
        }
      }
      else {
        throw new Error('Unknown type: ' + obj);
      }
    };
    
    /**
     * Decode a packet String (JSON data)
     *
     * @param {String} str
     * @return {Object} packet
     * @api private
     */
    
    function decodeString(str) {
      var p = {};
      var i = 0;
    
      // look up type
      p.type = Number(str.charAt(0));
      if (null == exports.types[p.type]) return error();
    
      // look up attachments if type binary
      if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
        var buf = '';
        while (str.charAt(++i) != '-') {
          buf += str.charAt(i);
          if (i + 1 == str.length) break;
        }
        if (buf != Number(buf) || str.charAt(i) != '-') {
          throw new Error('Illegal attachments');
        }
        p.attachments = Number(buf);
      }
    
      // look up namespace (if any)
      if ('/' == str.charAt(i + 1)) {
        p.nsp = '';
        while (++i) {
          var c = str.charAt(i);
          if (',' == c) break;
          p.nsp += c;
          if (i + 1 == str.length) break;
        }
      } else {
        p.nsp = '/';
      }
    
      // look up id
      var next = str.charAt(i + 1);
      if ('' !== next && Number(next) == next) {
        p.id = '';
        while (++i) {
          var c = str.charAt(i);
          if (null == c || Number(c) != c) {
            --i;
            break;
          }
          p.id += str.charAt(i);
          if (i + 1 == str.length) break;
        }
        p.id = Number(p.id);
      }
    
      // look up json data
      if (str.charAt(++i)) {
        try {
          p.data = json.parse(str.substr(i));
        } catch(e){
          return error();
        }
      }
    
      debug('decoded %s as %j', str, p);
      return p;
    }
    
    /**
     * Deallocates a parser's resources
     *
     * @api public
     */
    
    Decoder.prototype.destroy = function() {
      if (this.reconstructor) {
        this.reconstructor.finishedReconstruction();
      }
    };
    
    /**
     * A manager of a binary event's 'buffer sequence'. Should
     * be constructed whenever a packet of type BINARY_EVENT is
     * decoded.
     *
     * @param {Object} packet
     * @return {BinaryReconstructor} initialized reconstructor
     * @api private
     */
    
    function BinaryReconstructor(packet) {
      this.reconPack = packet;
      this.buffers = [];
    }
    
    /**
     * Method to be called when binary data received from connection
     * after a BINARY_EVENT packet.
     *
     * @param {Buffer | ArrayBuffer} binData - the raw binary data received
     * @return {null | Object} returns null if more binary data is expected or
     *   a reconstructed packet object if all buffers have been received.
     * @api private
     */
    
    BinaryReconstructor.prototype.takeBinaryData = function(binData) {
      this.buffers.push(binData);
      if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
        var packet = binary.reconstructPacket(this.reconPack, this.buffers);
        this.finishedReconstruction();
        return packet;
      }
      return null;
    };
    
    /**
     * Cleans up binary packet reconstruction variables.
     *
     * @api private
     */
    
    BinaryReconstructor.prototype.finishedReconstruction = function() {
      this.reconPack = null;
      this.buffers = [];
    };
    
    function error(data){
      return {
        type: exports.ERROR,
        data: 'parser error'
      };
    }
    
    },{"./binary":45,"./is-buffer":47,"component-emitter":9,"debug":10,"isarray":48,"json3":49}],47:[function(_dereq_,module,exports){
    (function (global){
    
    module.exports = isBuf;
    
    /**
     * Returns true if obj is a buffer or an arraybuffer.
     *
     * @api private
     */
    
    function isBuf(obj) {
      return (global.Buffer && global.Buffer.isBuffer(obj)) ||
             (global.ArrayBuffer && obj instanceof ArrayBuffer);
    }
    
    }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    },{}],48:[function(_dereq_,module,exports){
    module.exports=_dereq_(32)
    },{}],49:[function(_dereq_,module,exports){
    /*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
    ;(function (window) {
      // Convenience aliases.
      var getClass = {}.toString, isProperty, forEach, undef;
    
      // Detect the `define` function exposed by asynchronous module loaders. The
      // strict `define` check is necessary for compatibility with `r.js`.
      var isLoader = typeof define === "function" && define.amd;
    
      // Detect native implementations.
      var nativeJSON = typeof JSON == "object" && JSON;
    
      // Set up the JSON 3 namespace, preferring the CommonJS `exports` object if
      // available.
      var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports;
    
      if (JSON3 && nativeJSON) {
        // Explicitly delegate to the native `stringify` and `parse`
        // implementations in CommonJS environments.
        JSON3.stringify = nativeJSON.stringify;
        JSON3.parse = nativeJSON.parse;
      } else {
        // Export for web browsers, JavaScript engines, and asynchronous module
        // loaders, using the global `JSON` object if available.
        JSON3 = window.JSON = nativeJSON || {};
      }
    
      // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
      var isExtended = new Date(-3509827334573292);
      try {
        // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
        // results for certain dates in Opera >= 10.53.
        isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
          // Safari < 2.0.2 stores the internal millisecond time value correctly,
          // but clips the values returned by the date methods to the range of
          // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
          isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
      } catch (exception) {}
    
      // Internal: Determines whether the native `JSON.stringify` and `parse`
      // implementations are spec-compliant. Based on work by Ken Snyder.
      function has(name) {
        if (has[name] !== undef) {
          // Return cached feature test result.
          return has[name];
        }
    
        var isSupported;
        if (name == "bug-string-char-index") {
          // IE <= 7 doesn't support accessing string characters using square
          // bracket notation. IE 8 only supports this for primitives.
          isSupported = "a"[0] != "a";
        } else if (name == "json") {
          // Indicates whether both `JSON.stringify` and `JSON.parse` are
          // supported.
          isSupported = has("json-stringify") && has("json-parse");
        } else {
          var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
          // Test `JSON.stringify`.
          if (name == "json-stringify") {
            var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
            if (stringifySupported) {
              // A test function object with a custom `toJSON` method.
              (value = function () {
                return 1;
              }).toJSON = value;
              try {
                stringifySupported =
                  // Firefox 3.1b1 and b2 serialize string, number, and boolean
                  // primitives as object literals.
                  stringify(0) === "0" &&
                  // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
                  // literals.
                  stringify(new Number()) === "0" &&
                  stringify(new String()) == '""' &&
                  // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
                  // does not define a canonical JSON representation (this applies to
                  // objects with `toJSON` properties as well, *unless* they are nested
                  // within an object or array).
                  stringify(getClass) === undef &&
                  // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
                  // FF 3.1b3 pass this test.
                  stringify(undef) === undef &&
                  // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
                  // respectively, if the value is omitted entirely.
                  stringify() === undef &&
                  // FF 3.1b1, 2 throw an error if the given value is not a number,
                  // string, array, object, Boolean, or `null` literal. This applies to
                  // objects with custom `toJSON` methods as well, unless they are nested
                  // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
                  // methods entirely.
                  stringify(value) === "1" &&
                  stringify([value]) == "[1]" &&
                  // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
                  // `"[null]"`.
                  stringify([undef]) == "[null]" &&
                  // YUI 3.0.0b1 fails to serialize `null` literals.
                  stringify(null) == "null" &&
                  // FF 3.1b1, 2 halts serialization if an array contains a function:
                  // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
                  // elides non-JSON values from objects and arrays, unless they
                  // define custom `toJSON` methods.
                  stringify([undef, getClass, null]) == "[null,null,null]" &&
                  // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
                  // where character escape codes are expected (e.g., `\b` => `\u0008`).
                  stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
                  // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
                  stringify(null, value) === "1" &&
                  stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
                  // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
                  // serialize extended years.
                  stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
                  // The milliseconds are optional in ES 5, but required in 5.1.
                  stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
                  // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
                  // four-digit years instead of six-digit years. Credits: @Yaffle.
                  stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
                  // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
                  // values less than 1000. Credits: @Yaffle.
                  stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
              } catch (exception) {
                stringifySupported = false;
              }
            }
            isSupported = stringifySupported;
          }
          // Test `JSON.parse`.
          if (name == "json-parse") {
            var parse = JSON3.parse;
            if (typeof parse == "function") {
              try {
                // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
                // Conforming implementations should also coerce the initial argument to
                // a string prior to parsing.
                if (parse("0") === 0 && !parse(false)) {
                  // Simple parsing test.
                  value = parse(serialized);
                  var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
                  if (parseSupported) {
                    try {
                      // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
                      parseSupported = !parse('"\t"');
                    } catch (exception) {}
                    if (parseSupported) {
                      try {
                        // FF 4.0 and 4.0.1 allow leading `+` signs and leading
                        // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
                        // certain octal literals.
                        parseSupported = parse("01") !== 1;
                      } catch (exception) {}
                    }
                    if (parseSupported) {
                      try {
                        // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
                        // points. These environments, along with FF 3.1b1 and 2,
                        // also allow trailing commas in JSON objects and arrays.
                        parseSupported = parse("1.") !== 1;
                      } catch (exception) {}
                    }
                  }
                }
              } catch (exception) {
                parseSupported = false;
              }
            }
            isSupported = parseSupported;
          }
        }
        return has[name] = !!isSupported;
      }
    
      if (!has("json")) {
        // Common `[[Class]]` name aliases.
        var functionClass = "[object Function]";
        var dateClass = "[object Date]";
        var numberClass = "[object Number]";
        var stringClass = "[object String]";
        var arrayClass = "[object Array]";
        var booleanClass = "[object Boolean]";
    
        // Detect incomplete support for accessing string characters by index.
        var charIndexBuggy = has("bug-string-char-index");
    
        // Define additional utility methods if the `Date` methods are buggy.
        if (!isExtended) {
          var floor = Math.floor;
          // A mapping between the months of the year and the number of days between
          // January 1st and the first of the respective month.
          var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
          // Internal: Calculates the number of days between the Unix epoch and the
          // first day of the given month.
          var getDay = function (year, month) {
            return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
          };
        }
    
        // Internal: Determines if a property is a direct property of the given
        // object. Delegates to the native `Object#hasOwnProperty` method.
        if (!(isProperty = {}.hasOwnProperty)) {
          isProperty = function (property) {
            var members = {}, constructor;
            if ((members.__proto__ = null, members.__proto__ = {
              // The *proto* property cannot be set multiple times in recent
              // versions of Firefox and SeaMonkey.
              "toString": 1
            }, members).toString != getClass) {
              // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
              // supports the mutable *proto* property.
              isProperty = function (property) {
                // Capture and break the object's prototype chain (see section 8.6.2
                // of the ES 5.1 spec). The parenthesized expression prevents an
                // unsafe transformation by the Closure Compiler.
                var original = this.__proto__, result = property in (this.__proto__ = null, this);
                // Restore the original prototype chain.
                this.__proto__ = original;
                return result;
              };
            } else {
              // Capture a reference to the top-level `Object` constructor.
              constructor = members.constructor;
              // Use the `constructor` property to simulate `Object#hasOwnProperty` in
              // other environments.
              isProperty = function (property) {
                var parent = (this.constructor || constructor).prototype;
                return property in this && !(property in parent && this[property] === parent[property]);
              };
            }
            members = null;
            return isProperty.call(this, property);
          };
        }
    
        // Internal: A set of primitive types used by `isHostType`.
        var PrimitiveTypes = {
          'boolean': 1,
          'number': 1,
          'string': 1,
          'undefined': 1
        };
    
        // Internal: Determines if the given object `property` value is a
        // non-primitive.
        var isHostType = function (object, property) {
          var type = typeof object[property];
          return type == 'object' ? !!object[property] : !PrimitiveTypes[type];
        };
    
        // Internal: Normalizes the `for...in` iteration algorithm across
        // environments. Each enumerated key is yielded to a `callback` function.
        forEach = function (object, callback) {
          var size = 0, Properties, members, property;
    
          // Tests for bugs in the current environment's `for...in` algorithm. The
          // `valueOf` property inherits the non-enumerable flag from
          // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
          (Properties = function () {
            this.valueOf = 0;
          }).prototype.valueOf = 0;
    
          // Iterate over a new instance of the `Properties` class.
          members = new Properties();
          for (property in members) {
            // Ignore all properties inherited from `Object.prototype`.
            if (isProperty.call(members, property)) {
              size++;
            }
          }
          Properties = members = null;
    
          // Normalize the iteration algorithm.
          if (!size) {
            // A list of non-enumerable properties inherited from `Object.prototype`.
            members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
            // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
            // properties.
            forEach = function (object, callback) {
              var isFunction = getClass.call(object) == functionClass, property, length;
              var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty;
              for (property in object) {
                // Gecko <= 1.0 enumerates the `prototype` property of functions under
                // certain conditions; IE does not.
                if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
                  callback(property);
                }
              }
              // Manually invoke the callback for each non-enumerable property.
              for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
            };
          } else if (size == 2) {
            // Safari <= 2.0.4 enumerates shadowed properties twice.
            forEach = function (object, callback) {
              // Create a set of iterated properties.
              var members = {}, isFunction = getClass.call(object) == functionClass, property;
              for (property in object) {
                // Store each property name to prevent double enumeration. The
                // `prototype` property of functions is not enumerated due to cross-
                // environment inconsistencies.
                if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
                  callback(property);
                }
              }
            };
          } else {
            // No bugs detected; use the standard `for...in` algorithm.
            forEach = function (object, callback) {
              var isFunction = getClass.call(object) == functionClass, property, isConstructor;
              for (property in object) {
                if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
                  callback(property);
                }
              }
              // Manually invoke the callback for the `constructor` property due to
              // cross-environment inconsistencies.
              if (isConstructor || isProperty.call(object, (property = "constructor"))) {
                callback(property);
              }
            };
          }
          return forEach(object, callback);
        };
    
        // Public: Serializes a JavaScript `value` as a JSON string. The optional
        // `filter` argument may specify either a function that alters how object and
        // array members are serialized, or an array of strings and numbers that
        // indicates which properties should be serialized. The optional `width`
        // argument may be either a string or number that specifies the indentation
        // level of the output.
        if (!has("json-stringify")) {
          // Internal: A map of control characters and their escaped equivalents.
          var Escapes = {
            92: "\\\\",
            34: '\\"',
            8: "\\b",
            12: "\\f",
            10: "\\n",
            13: "\\r",
            9: "\\t"
          };
    
          // Internal: Converts `value` into a zero-padded string such that its
          // length is at least equal to `width`. The `width` must be <= 6.
          var leadingZeroes = "000000";
          var toPaddedString = function (width, value) {
            // The `|| 0` expression is necessary to work around a bug in
            // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
            return (leadingZeroes + (value || 0)).slice(-width);
          };
    
          // Internal: Double-quotes a string `value`, replacing all ASCII control
          // characters (characters with code unit values between 0 and 31) with
          // their escaped equivalents. This is an implementation of the
          // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
          var unicodePrefix = "\\u00";
          var quote = function (value) {
            var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
            if (isLarge) {
              symbols = value.split("");
            }
            for (; index < length; index++) {
              var charCode = value.charCodeAt(index);
              // If the character is a control character, append its Unicode or
              // shorthand escape sequence; otherwise, append the character as-is.
              switch (charCode) {
                case 8: case 9: case 10: case 12: case 13: case 34: case 92:
                  result += Escapes[charCode];
                  break;
                default:
                  if (charCode < 32) {
                    result += unicodePrefix + toPaddedString(2, charCode.toString(16));
                    break;
                  }
                  result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
              }
            }
            return result + '"';
          };
    
          // Internal: Recursively serializes an object. Implements the
          // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
          var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
            var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
            try {
              // Necessary for host object support.
              value = object[property];
            } catch (exception) {}
            if (typeof value == "object" && value) {
              className = getClass.call(value);
              if (className == dateClass && !isProperty.call(value, "toJSON")) {
                if (value > -1 / 0 && value < 1 / 0) {
                  // Dates are serialized according to the `Date#toJSON` method
                  // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
                  // for the ISO 8601 date time string format.
                  if (getDay) {
                    // Manually compute the year, month, date, hours, minutes,
                    // seconds, and milliseconds if the `getUTC*` methods are
                    // buggy. Adapted from @Yaffle's `date-shim` project.
                    date = floor(value / 864e5);
                    for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
                    for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
                    date = 1 + date - getDay(year, month);
                    // The `time` value specifies the time within the day (see ES
                    // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
                    // to compute `A modulo B`, as the `%` operator does not
                    // correspond to the `modulo` operation for negative numbers.
                    time = (value % 864e5 + 864e5) % 864e5;
                    // The hours, minutes, seconds, and milliseconds are obtained by
                    // decomposing the time within the day. See section 15.9.1.10.
                    hours = floor(time / 36e5) % 24;
                    minutes = floor(time / 6e4) % 60;
                    seconds = floor(time / 1e3) % 60;
                    milliseconds = time % 1e3;
                  } else {
                    year = value.getUTCFullYear();
                    month = value.getUTCMonth();
                    date = value.getUTCDate();
                    hours = value.getUTCHours();
                    minutes = value.getUTCMinutes();
                    seconds = value.getUTCSeconds();
                    milliseconds = value.getUTCMilliseconds();
                  }
                  // Serialize extended years correctly.
                  value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
                    "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
                    // Months, dates, hours, minutes, and seconds should have two
                    // digits; milliseconds should have three.
                    "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
                    // Milliseconds are optional in ES 5.0, but required in 5.1.
                    "." + toPaddedString(3, milliseconds) + "Z";
                } else {
                  value = null;
                }
              } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
                // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
                // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
                // ignores all `toJSON` methods on these objects unless they are
                // defined directly on an instance.
                value = value.toJSON(property);
              }
            }
            if (callback) {
              // If a replacement function was provided, call it to obtain the value
              // for serialization.
              value = callback.call(object, property, value);
            }
            if (value === null) {
              return "null";
            }
            className = getClass.call(value);
            if (className == booleanClass) {
              // Booleans are represented literally.
              return "" + value;
            } else if (className == numberClass) {
              // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
              // `"null"`.
              return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
            } else if (className == stringClass) {
              // Strings are double-quoted and escaped.
              return quote("" + value);
            }
            // Recursively serialize objects and arrays.
            if (typeof value == "object") {
              // Check for cyclic structures. This is a linear search; performance
              // is inversely proportional to the number of unique nested objects.
              for (length = stack.length; length--;) {
                if (stack[length] === value) {
                  // Cyclic structures cannot be serialized by `JSON.stringify`.
                  throw TypeError();
                }
              }
              // Add the object to the stack of traversed objects.
              stack.push(value);
              results = [];
              // Save the current indentation level and indent one additional level.
              prefix = indentation;
              indentation += whitespace;
              if (className == arrayClass) {
                // Recursively serialize array elements.
                for (index = 0, length = value.length; index < length; index++) {
                  element = serialize(index, value, callback, properties, whitespace, indentation, stack);
                  results.push(element === undef ? "null" : element);
                }
                result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
              } else {
                // Recursively serialize object members. Members are selected from
                // either a user-specified list of property names, or the object
                // itself.
                forEach(properties || value, function (property) {
                  var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
                  if (element !== undef) {
                    // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
                    // is not the empty string, let `member` {quote(property) + ":"}
                    // be the concatenation of `member` and the `space` character."
                    // The "`space` character" refers to the literal space
                    // character, not the `space` {width} argument provided to
                    // `JSON.stringify`.
                    results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
                  }
                });
                result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
              }
              // Remove the object from the traversed object stack.
              stack.pop();
              return result;
            }
          };
    
          // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
          JSON3.stringify = function (source, filter, width) {
            var whitespace, callback, properties, className;
            if (typeof filter == "function" || typeof filter == "object" && filter) {
              if ((className = getClass.call(filter)) == functionClass) {
                callback = filter;
              } else if (className == arrayClass) {
                // Convert the property names array into a makeshift set.
                properties = {};
                for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
              }
            }
            if (width) {
              if ((className = getClass.call(width)) == numberClass) {
                // Convert the `width` to an integer and create a string containing
                // `width` number of space characters.
                if ((width -= width % 1) > 0) {
                  for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
                }
              } else if (className == stringClass) {
                whitespace = width.length <= 10 ? width : width.slice(0, 10);
              }
            }
            // Opera <= 7.54u2 discards the values associated with empty string keys
            // (`""`) only if they are used directly within an object member list
            // (e.g., `!("" in { "": 1})`).
            return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
          };
        }
    
        // Public: Parses a JSON source string.
        if (!has("json-parse")) {
          var fromCharCode = String.fromCharCode;
    
          // Internal: A map of escaped control characters and their unescaped
          // equivalents.
          var Unescapes = {
            92: "\\",
            34: '"',
            47: "/",
            98: "\b",
            116: "\t",
            110: "\n",
            102: "\f",
            114: "\r"
          };
    
          // Internal: Stores the parser state.
          var Index, Source;
    
          // Internal: Resets the parser state and throws a `SyntaxError`.
          var abort = function() {
            Index = Source = null;
            throw SyntaxError();
          };
    
          // Internal: Returns the next token, or `"$"` if the parser has reached
          // the end of the source string. A token may be a string, number, `null`
          // literal, or Boolean literal.
          var lex = function () {
            var source = Source, length = source.length, value, begin, position, isSigned, charCode;
            while (Index < length) {
              charCode = source.charCodeAt(Index);
              switch (charCode) {
                case 9: case 10: case 13: case 32:
                  // Skip whitespace tokens, including tabs, carriage returns, line
                  // feeds, and space characters.
                  Index++;
                  break;
                case 123: case 125: case 91: case 93: case 58: case 44:
                  // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
                  // the current position.
                  value = charIndexBuggy ? source.charAt(Index) : source[Index];
                  Index++;
                  return value;
                case 34:
                  // `"` delimits a JSON string; advance to the next character and
                  // begin parsing the string. String tokens are prefixed with the
                  // sentinel `@` character to distinguish them from punctuators and
                  // end-of-string tokens.
                  for (value = "@", Index++; Index < length;) {
                    charCode = source.charCodeAt(Index);
                    if (charCode < 32) {
                      // Unescaped ASCII control characters (those with a code unit
                      // less than the space character) are not permitted.
                      abort();
                    } else if (charCode == 92) {
                      // A reverse solidus (`\`) marks the beginning of an escaped
                      // control character (including `"`, `\`, and `/`) or Unicode
                      // escape sequence.
                      charCode = source.charCodeAt(++Index);
                      switch (charCode) {
                        case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
                          // Revive escaped control characters.
                          value += Unescapes[charCode];
                          Index++;
                          break;
                        case 117:
                          // `\u` marks the beginning of a Unicode escape sequence.
                          // Advance to the first character and validate the
                          // four-digit code point.
                          begin = ++Index;
                          for (position = Index + 4; Index < position; Index++) {
                            charCode = source.charCodeAt(Index);
                            // A valid sequence comprises four hexdigits (case-
                            // insensitive) that form a single hexadecimal value.
                            if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
                              // Invalid Unicode escape sequence.
                              abort();
                            }
                          }
                          // Revive the escaped character.
                          value += fromCharCode("0x" + source.slice(begin, Index));
                          break;
                        default:
                          // Invalid escape sequence.
                          abort();
                      }
                    } else {
                      if (charCode == 34) {
                        // An unescaped double-quote character marks the end of the
                        // string.
                        break;
                      }
                      charCode = source.charCodeAt(Index);
                      begin = Index;
                      // Optimize for the common case where a string is valid.
                      while (charCode >= 32 && charCode != 92 && charCode != 34) {
                        charCode = source.charCodeAt(++Index);
                      }
                      // Append the string as-is.
                      value += source.slice(begin, Index);
                    }
                  }
                  if (source.charCodeAt(Index) == 34) {
                    // Advance to the next character and return the revived string.
                    Index++;
                    return value;
                  }
                  // Unterminated string.
                  abort();
                default:
                  // Parse numbers and literals.
                  begin = Index;
                  // Advance past the negative sign, if one is specified.
                  if (charCode == 45) {
                    isSigned = true;
                    charCode = source.charCodeAt(++Index);
                  }
                  // Parse an integer or floating-point value.
                  if (charCode >= 48 && charCode <= 57) {
                    // Leading zeroes are interpreted as octal literals.
                    if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
                      // Illegal octal literal.
                      abort();
                    }
                    isSigned = false;
                    // Parse the integer component.
                    for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
                    // Floats cannot contain a leading decimal point; however, this
                    // case is already accounted for by the parser.
                    if (source.charCodeAt(Index) == 46) {
                      position = ++Index;
                      // Parse the decimal component.
                      for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                      if (position == Index) {
                        // Illegal trailing decimal.
                        abort();
                      }
                      Index = position;
                    }
                    // Parse exponents. The `e` denoting the exponent is
                    // case-insensitive.
                    charCode = source.charCodeAt(Index);
                    if (charCode == 101 || charCode == 69) {
                      charCode = source.charCodeAt(++Index);
                      // Skip past the sign following the exponent, if one is
                      // specified.
                      if (charCode == 43 || charCode == 45) {
                        Index++;
                      }
                      // Parse the exponential component.
                      for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                      if (position == Index) {
                        // Illegal empty exponent.
                        abort();
                      }
                      Index = position;
                    }
                    // Coerce the parsed value to a JavaScript number.
                    return +source.slice(begin, Index);
                  }
                  // A negative sign may only precede numbers.
                  if (isSigned) {
                    abort();
                  }
                  // `true`, `false`, and `null` literals.
                  if (source.slice(Index, Index + 4) == "true") {
                    Index += 4;
                    return true;
                  } else if (source.slice(Index, Index + 5) == "false") {
                    Index += 5;
                    return false;
                  } else if (source.slice(Index, Index + 4) == "null") {
                    Index += 4;
                    return null;
                  }
                  // Unrecognized token.
                  abort();
              }
            }
            // Return the sentinel `$` character if the parser has reached the end
            // of the source string.
            return "$";
          };
    
          // Internal: Parses a JSON `value` token.
          var get = function (value) {
            var results, hasMembers;
            if (value == "$") {
              // Unexpected end of input.
              abort();
            }
            if (typeof value == "string") {
              if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
                // Remove the sentinel `@` character.
                return value.slice(1);
              }
              // Parse object and array literals.
              if (value == "[") {
                // Parses a JSON array, returning a new JavaScript array.
                results = [];
                for (;; hasMembers || (hasMembers = true)) {
                  value = lex();
                  // A closing square bracket marks the end of the array literal.
                  if (value == "]") {
                    break;
                  }
                  // If the array literal contains elements, the current token
                  // should be a comma separating the previous element from the
                  // next.
                  if (hasMembers) {
                    if (value == ",") {
                      value = lex();
                      if (value == "]") {
                        // Unexpected trailing `,` in array literal.
                        abort();
                      }
                    } else {
                      // A `,` must separate each array element.
                      abort();
                    }
                  }
                  // Elisions and leading commas are not permitted.
                  if (value == ",") {
                    abort();
                  }
                  results.push(get(value));
                }
                return results;
              } else if (value == "{") {
                // Parses a JSON object, returning a new JavaScript object.
                results = {};
                for (;; hasMembers || (hasMembers = true)) {
                  value = lex();
                  // A closing curly brace marks the end of the object literal.
                  if (value == "}") {
                    break;
                  }
                  // If the object literal contains members, the current token
                  // should be a comma separator.
                  if (hasMembers) {
                    if (value == ",") {
                      value = lex();
                      if (value == "}") {
                        // Unexpected trailing `,` in object literal.
                        abort();
                      }
                    } else {
                      // A `,` must separate each object member.
                      abort();
                    }
                  }
                  // Leading commas are not permitted, object property names must be
                  // double-quoted strings, and a `:` must separate each property
                  // name and value.
                  if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
                    abort();
                  }
                  results[value.slice(1)] = get(lex());
                }
                return results;
              }
              // Unexpected token encountered.
              abort();
            }
            return value;
          };
    
          // Internal: Updates a traversed object member.
          var update = function(source, property, callback) {
            var element = walk(source, property, callback);
            if (element === undef) {
              delete source[property];
            } else {
              source[property] = element;
            }
          };
    
          // Internal: Recursively traverses a parsed JSON object, invoking the
          // `callback` function for each value. This is an implementation of the
          // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
          var walk = function (source, property, callback) {
            var value = source[property], length;
            if (typeof value == "object" && value) {
              // `forEach` can't be used to traverse an array in Opera <= 8.54
              // because its `Object#hasOwnProperty` implementation returns `false`
              // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
              if (getClass.call(value) == arrayClass) {
                for (length = value.length; length--;) {
                  update(value, length, callback);
                }
              } else {
                forEach(value, function (property) {
                  update(value, property, callback);
                });
              }
            }
            return callback.call(source, property, value);
          };
    
          // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
          JSON3.parse = function (source, callback) {
            var result, value;
            Index = 0;
            Source = "" + source;
            result = get(lex());
            // If a JSON string contains multiple tokens, it is invalid.
            if (lex() != "$") {
              abort();
            }
            // Reset the parser state.
            Index = Source = null;
            return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
          };
        }
      }
    
      // Export for asynchronous module loaders.
      if (isLoader) {
        define(function () {
          return JSON3;
        });
      }
    }(this));
    
    },{}],50:[function(_dereq_,module,exports){
    module.exports = toArray
    
    function toArray(list, index) {
        var array = []
    
        index = index || 0
    
        for (var i = index || 0; i < list.length; i++) {
            array[i - index] = list[i]
        }
    
        return array
    }
    
    },{}]},{},[1])
    (1)
    });
    